BE643085A - - Google Patents
Info
- Publication number
- BE643085A BE643085A BE643085DA BE643085A BE 643085 A BE643085 A BE 643085A BE 643085D A BE643085D A BE 643085DA BE 643085 A BE643085 A BE 643085A
- Authority
- BE
- Belgium
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
- C01B3/56—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids
- C01B3/58—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids including a catalytic reaction
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B19/00—Cartridges with absorbing substances for respiratory apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/024—Compounds of Zn, Cd, Hg
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
- B01J20/0285—Sulfides of compounds other than those provided for in B01J20/045
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/04—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
- C01B3/56—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with solids; Regeneration of used solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/104—Alumina
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4541—Gas separation or purification devices adapted for specific applications for portable use, e.g. gas masks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/455—Gas separation or purification devices adapted for specific applications for transportable use
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/042—Purification by adsorption on solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0435—Catalytic purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
- C01B2203/0465—Composition of the impurity
- C01B2203/0485—Composition of the impurity the impurity being a sulfur compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- General Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pulmonology (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Materials Engineering (AREA)
- Epidemiology (AREA)
- Business, Economics & Management (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Catalysts (AREA)
- Gas Separation By Absorption (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US254458A US3257776A (en) | 1963-01-28 | 1963-01-28 | Process for reducing the concentration of mercury in hydrogen gas |
IT2264864 | 1964-10-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE643085A true BE643085A (xx) | 1964-05-15 |
Family
ID=26328240
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE643085D BE643085A (xx) | 1963-01-28 | 1964-01-23 | |
BE671048A BE671048A (xx) | 1963-01-28 | 1965-10-18 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE671048A BE671048A (xx) | 1963-01-28 | 1965-10-18 |
Country Status (7)
Country | Link |
---|---|
US (2) | US3257776A (xx) |
BE (2) | BE643085A (xx) |
DE (2) | DE1244721B (xx) |
FR (2) | FR1380360A (xx) |
GB (2) | GB1000957A (xx) |
NL (2) | NL6400632A (xx) |
SE (1) | SE323585B (xx) |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3476552A (en) * | 1966-09-07 | 1969-11-04 | Mountain Copper Co Of Californ | Mercury process |
DE2109146C3 (de) * | 1971-02-26 | 1980-03-20 | Bayer Ag, 5090 Leverkusen | Verfahren zur Entfernung von Jod und Jodverbindungen aus Gasen und Dämpfen und silbernitratimprägnierte Sorptionsmittel zur Durchführung des Verfahrens |
US3919389A (en) * | 1971-05-10 | 1975-11-11 | Inst De Cercetari I Proiectari | Method of purifying air containing mercury vapor |
US3786619A (en) * | 1971-06-04 | 1974-01-22 | Boliden Ab | Method of purifying gases containing mercury compounds and elementary mercury |
RO55368A2 (xx) * | 1971-06-07 | 1973-08-20 | ||
US3755989A (en) * | 1972-06-16 | 1973-09-04 | Union Carbide Corp | Removal of mercury from gas streams |
DE2305522C2 (de) * | 1973-02-05 | 1979-06-28 | Preussag Ag Metall, 3380 Goslar | Verfahren zur Gewinnung von Quecksilber aus SO2 -haltigen Röstgasen |
US3888124A (en) * | 1973-08-07 | 1975-06-10 | Us Energy | Atmospheric mercury sampling material and method |
US3855387A (en) * | 1973-09-05 | 1974-12-17 | St Joe Minerals Corp | Method for removing mercury from industrial gases |
FR2264591B1 (xx) * | 1974-03-19 | 1978-03-17 | Nippon Shinyaku Co Ltd | |
US3933431A (en) * | 1974-07-23 | 1976-01-20 | The United States Of America As Represented By The United States Energy Research And Development Administration | Method and apparatus for sampling atmospheric mercury |
US4044098A (en) * | 1976-05-18 | 1977-08-23 | Phillips Petroleum Company | Removal of mercury from gas streams using hydrogen sulfide and amines |
JPS5323888A (en) * | 1976-08-19 | 1978-03-04 | Dowa Mining Co | Removal of mercury |
US4206183A (en) * | 1976-12-09 | 1980-06-03 | Dowa Mining Co., Ltd. | Method of removing mercury-containing contaminations in gases |
JPS598419B2 (ja) * | 1978-08-14 | 1984-02-24 | 株式会社日立製作所 | 単体ヨウ素または有機ヨウ素化合物の吸着材 |
SE415448B (sv) * | 1979-01-10 | 1980-10-06 | Svenska Flaektfabriken Ab | Forfarande for rening av gaser innehallande gasformigt kvicksilver |
FR2529802A1 (fr) * | 1982-07-06 | 1984-01-13 | Pro Catalyse | Masses d'absorption pour l'elimination du mercure |
FR2534826A1 (fr) * | 1982-10-26 | 1984-04-27 | Pro Catalyse | Nouvelles masses d'absorption pour l'elimination du mercure comportant un support sur lequel est depose du soufre |
US4591490A (en) * | 1984-10-19 | 1986-05-27 | Phillips Petroleum Co. | Removal of mercury from gases |
US4843102A (en) * | 1984-10-19 | 1989-06-27 | Phillips Petroleum Company | Removal of mercury from gases |
DE3702306A1 (de) * | 1987-01-27 | 1988-08-04 | Hoelter Heinz | Verfahren zur abtrennung von schwermetallen aus den abgasen von feuerungsanlagen |
US4892567A (en) * | 1988-08-15 | 1990-01-09 | Mobil Oil Corporation | Simultaneous removal of mercury and water from fluids |
US4874525A (en) * | 1988-10-26 | 1989-10-17 | Uop | Purification of fluid streams containing mercury |
US4909926A (en) * | 1989-02-01 | 1990-03-20 | Mobil Oil Corporation | Method for removing mercury from hydrocarbon oil by high temperature reactive adsorption |
AT395381B (de) * | 1990-09-24 | 1992-12-10 | Wernisch Johann | Verfahren, einrichtung und filter zum abscheiden von hg-dampf aus gasen |
US5223145A (en) * | 1992-10-09 | 1993-06-29 | Uop | Removal of mercury from process streams |
DE4302166C2 (de) * | 1993-01-27 | 1997-03-13 | Degussa | Verfahren zum Regenerieren von Quecksilberadsorptionsmitteln |
US5928617A (en) * | 1996-08-19 | 1999-07-27 | Quick Chemical Specialties Corp. | Process for removal of mercury contamination |
DE69817942T2 (de) * | 1997-07-28 | 2004-07-29 | Corning Inc. | Katalysator zum Entfernen von Quecksilber und Verfahren zu dessen Herstellung und Verwendung |
US6403044B1 (en) | 1998-02-27 | 2002-06-11 | Ada Technologies, Inc. | Method and apparatus for stabilizing liquid elemental mercury |
US6797178B2 (en) * | 2000-03-24 | 2004-09-28 | Ada Technologies, Inc. | Method for removing mercury and mercuric compounds from dental effluents |
WO2002043814A1 (en) | 2000-11-28 | 2002-06-06 | Ada Technologies, Inc. | Improved method for fixating sludges and soils contaminated with mercury and other heavy metals |
US7048781B1 (en) | 2002-10-07 | 2006-05-23 | Ada Technologies, Inc. | Chemically-impregnated silicate agents for mercury control |
US6942840B1 (en) | 2001-09-24 | 2005-09-13 | Ada Technologies, Inc. | Method for removal and stabilization of mercury in mercury-containing gas streams |
JP3872677B2 (ja) * | 2001-10-31 | 2007-01-24 | 三菱重工業株式会社 | 水銀除去方法およびそのシステム |
US7183235B2 (en) * | 2002-06-21 | 2007-02-27 | Ada Technologies, Inc. | High capacity regenerable sorbent for removing arsenic and other toxic ions from drinking water |
WO2005032394A2 (en) * | 2003-10-01 | 2005-04-14 | Ada Technologies, Inc. | System for removing mercury and mercuric compounds from dental wastes |
US9550148B2 (en) * | 2015-06-02 | 2017-01-24 | Paragon Waste Solutions, Llc | Heavy metal removal |
WO2018045374A1 (en) | 2016-09-02 | 2018-03-08 | Regents Of The University Of Minnesota | Systems and methods for body-proximate recoverable capture of mercury vapor during cremation |
CN107233607B (zh) * | 2017-06-27 | 2020-03-31 | 东莞御治医疗器械有限公司 | 一种创面保护膜材料的制备方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2773844A (en) * | 1953-06-12 | 1956-12-11 | Shell Dev | Method for making supported silver catalysts |
DE1075953B (de) * | 1957-02-08 | 1960-02-18 | Sigma Lutin | Filtermasse gegen Quecksilberdaempfe |
NL258555A (xx) * | 1959-11-30 | |||
US3100146A (en) * | 1960-09-20 | 1963-08-06 | Huntington Chemical Corp | Method and apparatus for the condensation, agglomeration, filtration and absorption of the exhaust gases from internal combustion engines |
US3194629A (en) * | 1962-02-23 | 1965-07-13 | Pittsburgh Activated Carbon Co | Method of removing mercury vapor from gases |
US3193987A (en) * | 1962-02-23 | 1965-07-13 | Pittsburgh Activated Carbon Co | Mercury vapor removal |
-
1963
- 1963-01-28 US US254458A patent/US3257776A/en not_active Expired - Lifetime
-
1964
- 1964-01-23 BE BE643085D patent/BE643085A/xx unknown
- 1964-01-27 GB GB3414/64A patent/GB1000957A/en not_active Expired
- 1964-01-28 NL NL6400632A patent/NL6400632A/xx unknown
- 1964-01-28 DE DEA45107A patent/DE1244721B/de active Pending
- 1964-01-28 FR FR961826A patent/FR1380360A/fr not_active Expired
-
1965
- 1965-10-14 NL NL656513308A patent/NL143820B/xx not_active IP Right Cessation
- 1965-10-15 GB GB43859/65A patent/GB1126215A/en not_active Expired
- 1965-10-16 DE DE1544130A patent/DE1544130C2/de not_active Expired
- 1965-10-18 BE BE671048A patent/BE671048A/xx unknown
- 1965-10-18 FR FR35266A patent/FR1450243A/fr not_active Expired
- 1965-10-20 SE SE13561/65A patent/SE323585B/xx unknown
-
1969
- 1969-06-20 US US838028A patent/US3661509A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB1000957A (en) | 1965-08-11 |
DE1544130C2 (de) | 1974-09-12 |
US3257776A (en) | 1966-06-28 |
NL143820B (nl) | 1974-11-15 |
BE671048A (xx) | 1966-02-12 |
DE1544130B1 (de) | 1970-10-15 |
SE323585B (xx) | 1970-05-04 |
FR1450243A (fr) | 1966-05-06 |
GB1126215A (en) | 1968-09-05 |
NL6400632A (xx) | 1964-07-29 |
NL6513308A (xx) | 1966-04-21 |
US3661509A (en) | 1972-05-09 |
DE1244721B (de) | 1967-07-20 |
FR1380360A (fr) | 1964-11-27 |