EP0067687A3 - Magnetic fluid - Google Patents

Magnetic fluid Download PDF

Info

Publication number: EP0067687A3
Authority: EP; European Patent Office
Prior art keywords: magnetic fluid; fluid; magnetic
Prior art date: 1981-06-12
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.): Granted

Application number

EP19820303043

Other versions

EP0067687A2 (en

EP0067687B1 (en

Inventor

Mamoru Soga

Keiichi Yubakami

Nobuo Sonoda

Wataru Shimotsuma

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Panasonic Holdings Corp

Original Assignee

Matsushita Electric Industrial Co Ltd

Priority date (The priority date 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 date listed.)

1981-06-12

Filing date

1982-06-11

Publication date

1983-12-07

1982-06-11 Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd

1982-12-22 Publication of EP0067687A2 publication Critical patent/EP0067687A2/en

1983-12-07 Publication of EP0067687A3 publication Critical patent/EP0067687A3/en

1987-04-01 Application granted granted Critical

1987-04-01 Publication of EP0067687B1 publication Critical patent/EP0067687B1/en

Status Expired legal-status Critical Current

Links

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids

EP82303043A 1981-06-12 1982-06-11 Magnetofluidographic or jet-ink Expired EP0067687B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP9117781A JPS57205466A (en)	1981-06-12	1981-06-12	Magnetic ink for recording
JP91177/81		1981-06-12

Publications (3)

Publication Number	Publication Date
EP0067687A2 EP0067687A2 (en)	1982-12-22
EP0067687A3 true EP0067687A3 (en)	1983-12-07
EP0067687B1 EP0067687B1 (en)	1987-04-01

Family

ID=14019174

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP82303043A Expired EP0067687B1 (en)	1981-06-12	1982-06-11	Magnetofluidographic or jet-ink

Country Status (3)

Country	Link
EP (1)	EP0067687B1 (en)
JP (1)	JPS57205466A (en)
DE (1)	DE3275962D1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS59179569A (en) *	1983-03-29	1984-10-12	Canon Inc	Recording liquid
GB8423691D0 (en) *	1984-09-19	1984-10-24	Er Fluid Dev	Servo-operated torque controlling devices
US4604229A (en) *	1985-03-20	1986-08-05	Ferrofluidics Corporation	Electrically conductive ferrofluid compositions and method of preparing and using same
EP0206516A3 (en) *	1985-05-21	1988-08-10	Ferrofluidics Corporation	Ferrofluid composition, method of making, and apparatus and method using same
FR2634775B1 (en) *	1988-07-29	1990-09-14	Bull Sa	PROCESS FOR OBTAINING A MAGNETIC MATERIAL TRANSPARENT TO LIGHT AND HIGH RESISTIVITY
DE4115608A1 (en) *	1991-05-14	1992-11-19	Basf Ag	MAGNETIC INK CONCENTRATE
GB2313608B (en) *	1993-04-21	1998-01-21	Dotspec Ltd	Improvements in or relating to deinking of paper
GB9308250D0 (en) *	1993-04-21	1993-06-02	Dotspec Ltd	Improvements in or relating to deinking of paper
US5685952A (en) *	1993-04-21	1997-11-11	Owen; David Malcolm	Deinking of paper using magnetic forces
JP4996984B2 (en) *	2007-06-01	2012-08-08	トッパン・フォームズ株式会社	Magnetic ink and manufacturing method thereof, and magnetic pattern and sheet having the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3928220A (en) *	1973-08-27	1975-12-23	Gen Electric	Preparation of hydrocarbon-dispersible magnetic microspheroids in powdered form
US4094804A (en) *	1974-08-19	1978-06-13	Junzo Shimoiizaka	Method for preparing a water base magnetic fluid and product
US4101646A (en) *	1970-05-13	1978-07-18	Rikagaku Kenkyusho	Ferrite vascular contrast media
US4280918A (en) *	1980-03-10	1981-07-28	International Business Machines Corporation	Magnetic particle dispersions
EP0055065A2 (en) *	1980-12-19	1982-06-30	Matsushita Electric Industrial Co., Ltd.	Magnetic fluid

1981
- 1981-06-12 JP JP9117781A patent/JPS57205466A/en active Pending
1982
- 1982-06-11 DE DE8282303043T patent/DE3275962D1/en not_active Expired
- 1982-06-11 EP EP82303043A patent/EP0067687B1/en not_active Expired

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4101646A (en) *	1970-05-13	1978-07-18	Rikagaku Kenkyusho	Ferrite vascular contrast media
US3928220A (en) *	1973-08-27	1975-12-23	Gen Electric	Preparation of hydrocarbon-dispersible magnetic microspheroids in powdered form
US4094804A (en) *	1974-08-19	1978-06-13	Junzo Shimoiizaka	Method for preparing a water base magnetic fluid and product
US4280918A (en) *	1980-03-10	1981-07-28	International Business Machines Corporation	Magnetic particle dispersions
EP0055065A2 (en) *	1980-12-19	1982-06-30	Matsushita Electric Industrial Co., Ltd.	Magnetic fluid

Also Published As

Publication number	Publication date
EP0067687A2 (en)	1982-12-22
JPS57205466A (en)	1982-12-16
DE3275962D1 (en)	1987-05-07
EP0067687B1 (en)	1987-04-01

Legal Events

Date	Code	Title	Description
1982-10-22	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1982-12-22	AK	Designated contracting states	Designated state(s): DE FR GB
1983-10-06	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1983-12-07	AK	Designated contracting states	Designated state(s): DE FR GB
1984-07-18	17P	Request for examination filed	Effective date: 19840509
1987-02-14	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1987-04-01	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB
1987-05-07	REF	Corresponds to:	Ref document number: 3275962 Country of ref document: DE Date of ref document: 19870507
1987-05-15	ET	Fr: translation filed
1988-03-12	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1988-03-12	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1988-04-27	26N	No opposition filed
1996-06-03	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 19960603 Year of fee payment: 15
1996-06-11	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19960611 Year of fee payment: 15
1996-06-12	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19960612 Year of fee payment: 15
1996-07-31	REG	Reference to a national code	Ref country code: GB Ref legal event code: 746 Effective date: 19960628
1997-06-11	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970611
1998-01-28	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 19970611
1998-02-27	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980227
1998-03-03	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19980303
1998-04-17	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST
1998-04-30	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST

Publication	Publication Date	Title
US4489711B1 (en)	1997-01-14	Magnetic plaster
DE3268489D1 (en)	1986-02-27	Magnetic sensor
JPS57140973A (en)	1982-08-31	Valve
JPS57129788A (en)	1982-08-11	Electrochromic-printing medium
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ZA818722B (en)	1982-11-24	Novel functional fluid
AU529287B2 (en)	1983-06-02	Magnetic fluid
PT72526A (en)	1981-02-26	Fluid agitador assembly
GB2111681B (en)	1985-09-11	Fluid flowmeter
ZA826446B (en)	1983-08-31	Magnetic filter
EP0067687A3 (en)	1983-12-07	Magnetic fluid
JPS57169917A (en)	1982-10-19	Multielement magnetic head-assembly
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JPS57169215A (en)	1982-10-18	Electromagnet
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EP0073570A3 (en)	1983-12-21	Magnetic fluid
GB2107085B (en)	1985-12-18	Magnetic suspension
GB8420718D0 (en)	1984-09-19	Magnetic fluid seal
DE3267742D1 (en)	1986-01-16	Magnetic transducer
DE3266368D1 (en)	1985-10-24	Electromagnetic valve
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GB8303922D0 (en)	1983-03-16	Valves
GB2095793B (en)	1985-04-11	Valves
JPS56102493A (en)	1981-08-15	Fluid servoomechanism