US4077936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid suspending medium for electrophoretic image display/and or recording device
Assignee: Panasonic Holdings Corp
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Filing: 1975-09-09
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Granted: 1978-03-07
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Expires: 1995-09-09
Abstract
Abstract This invention provides a liquid suspending medium for an electrophoretic image display and/or recording device, comprising as a main component an oligomer of 1,1,2-trifluoro-2-chloro-ethylene expressed by ##STR1## where n is 2 or 3, and each of X 1 and X 2 is Cl or F. The use of this oligomer facilitates gravity adjustment between the liquid suspending medium and electrophoretic particles, and results in a liquid suspending medium highly suitable for an electrophoretic image display and/or recording device.
Inventors
- 👤 Shigeru Tanaka
- 👤 Joichi Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:42
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/03; C09D11/033; G; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G03; G03G; G03G17/00; G03G17/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
75 words
A liquid suspending medium for an electrophoretic image display and/or recording device, comprising as a main component an oligomer of 1,1,2-trifluoro-2-chloroethylene expressed by ##STR7## where n is 2 or 3, and each of X 1 and X 2 is one member selected from the group consisting of Cl and F, and further comprising electrophoretic particles suspended therein in an amount sufficient to provide an electrophoretic effect, wherein each of said electrophoretic particles comprises titanium dioxide.
Claim 2
Dependent Claim
75 words
A liquid suspending medium for an electrophoretic image display and/or recording device, comprising as a main component an oligomer of 1,1,2-trifluoro-2-chloroethylene expressed by ##STR7## where n is 2 or 3, and each of X 1 and X 2 is one member selected from the group consisting of Cl and F, and further comprising electrophoretic particles suspended therein in an amount sufficient to provide an electrophoretic effect, wherein each of said electrophoretic particles comprises titanium dioxide.
Claim 3
Dependent Claim
19 words
A liquid suspending medium according to claim 1, wherein each of said electrophoretic particles has a resin coated thereon.
Claim 4
Dependent Claim
15 words
A liquid suspending medium according to claim 2 wherein said resin is a phenolic resin.
Claim 5
Dependent Claim
17 words
A liquid suspending medium according to claim 3 wherein said phenolic resin is a resol-type phenolic resin.
Claim 6
Dependent Claim
14 words
A liquid suspending medium according to claim 4 wherein said resin contains colored pigments.
Claim 7
Dependent Claim
13 words
A liquid suspending medium according to claim 5 which additionally contains a dyestuff.
Claim 8
Dependent Claim
13 words
A liquid suspending medium according to claim 4 which additionally contains a dyestuff.
Claim 9
Dependent Claim
14 words
A liquid suspending medium according to claim 3 wherein said resin contains colored pigments.
Claim 10
Dependent Claim
13 words
A liquid suspending medium according to claim 8 which additionally contains a dyestuff.
Claim 11
Dependent Claim
14 words
A liquid suspending medium according to claim 2 wherein said resin contains colored pigments.
Claim 12
Dependent Claim
13 words
A liquid suspending medium according to claim 10 which additionally contains a dyestuff.
Claim 13
Dependent Claim
13 words
A liquid suspending medium according to claim 1 which further contains a dyestuff.
Claim 14
Dependent Claim
18 words
A liquid suspending medium according to claim 1 which includes 50 to 100 volume percent of said oligomer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |