UST864023I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST864023I4 UST864023I4 US864023DH UST864023I4 US T864023 I4 UST864023 I4 US T864023I4 US 864023D H US864023D H US 864023DH US T864023 I4 UST864023 I4 US T864023I4
- Authority
- US
- United States
- Prior art keywords
- defensive publication
- safelight
- organic
- radiographic
- application
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/36—Desensitisers
Definitions
- Organic thioether compounds useful in the practice of the invention include any of those which contain at least one moiety wherein sulfur and oxygen atoms are separated by an ethylene radical (e.g., OOH C-H -S).
- suitable organic thioether compounds include l,10-dithia-4,7,13,16- tetraoxacyclooctadecane, 1,8 dihydroxy-Z,6-dithiaoctane, 4,IO-dithiatridecane-1,13-diol and the like.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pyridine Compounds (AREA)
Description
T 501 DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of drawing contained in the application as Originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 30 cents per sheet.
Applications published under the Defensive Publication Program have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED JULY 29, 1969 812 883 SAFELIGHT TOLERANbE 0F RADIOGRAPHIC EMULSIONS BY ADDITION OF ORGANIC THIOETHERS William Wendell Rees, Kodak Park Division,
Rochester, N.Y. 14650 Filed Apr. 2, 1969. Published July 29, 1969 Int. Cl. G03c 1/36, l/34 US. Cl. 96101 No Drawing. 7 Pages Specification Improved safelight tolerance is achieved in a radiographic silver halide emulsion by adding to said emulsion an organic thioether which, when utilized in an aqueous solution (60 C.) at 0.02 molar concentration, is capable of dissolving more than twice the amount by weight of silver chloride than that which can be dissolved by water at 60 C. The practice of the invention results in radiographic films which can be easily handled and processed under safelight lighting without substantially affecting the other photographic properties.
Safelight safety improvements are obtained by adding the organic thioethers during any of the digestion steps or as an addendum before coating. Organic thioether compounds useful in the practice of the invention include any of those which contain at least one moiety wherein sulfur and oxygen atoms are separated by an ethylene radical (e.g., OOH C-H -S). Examples of suitable organic thioether compounds include l,10-dithia-4,7,13,16- tetraoxacyclooctadecane, 1,8 dihydroxy-Z,6-dithiaoctane, 4,IO-dithiatridecane-1,13-diol and the like.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81288369A | 1969-04-02 | 1969-04-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
UST864023I4 true UST864023I4 (en) | 1969-07-29 |
Family
ID=25210871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US864023D Pending UST864023I4 (en) | 1969-04-02 | 1969-04-02 | Defensive publication |
Country Status (3)
Country | Link |
---|---|
US (1) | UST864023I4 (en) |
BE (1) | BE747884A (en) |
FR (1) | FR2022085A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1466411A (en) * | 1974-09-23 | 1977-03-09 | Lafon Labor | Sulphur-containing hydroxy aliphatic compounds |
-
1969
- 1969-04-02 US US864023D patent/UST864023I4/en active Pending
-
1970
- 1970-03-24 BE BE747884D patent/BE747884A/en unknown
- 1970-03-25 FR FR7010775A patent/FR2022085A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR2022085A1 (en) | 1970-07-31 |
BE747884A (en) | 1970-08-31 |
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