Patent USRE33040E successfully refreshed from Google Patents.
USRE33040E
Expired / Lapsed
US
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Electrochromic display device
Assignee: Seiko Instruments Inc
•
Filing: 1987-05-28
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Granted: 1989-08-29
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Expires: 2007-05-28
Abstract
Abstract An electrochromic display device containing at least two electrodes and electrolyte in contact therewith is disclosed, wherein the electrolyte is an electrolytic solution which has been gelated by polymer.
Inventors
- 👤 Hiroshi Kakiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:37
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
104 words
An electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising: at least two electrodes at least one of which is comprised of electrochromic material, and an electrolyte gel in contact with said electrodes and comprising an electrolytic solution absorbed and thereby gelated by a copolymer formed of a first monomer which when polymerized forms polymer soluble in the solvent of said electrolytic solution and a second monomer which when polymerized forms polymer insoluble in the solvent of said electrolytic solution in a proportion such that said copolymer is capable of absorbing an amount of said electrolytic solution sufficient to form a gel which is effective as an electrolyte.
Claim 2
Dependent Claim
104 words
An electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising: at least two electrodes at least one of which is comprised of electrochromic material, and an electrolyte gel in contact with said electrodes and comprising an electrolytic solution absorbed and thereby gelated by a copolymer formed of a first monomer which when polymerized forms polymer soluble in the solvent of said electrolytic solution and a second monomer which when polymerized forms polymer insoluble in the solvent of said electrolytic solution in a proportion such that said copolymer is capable of absorbing an amount of said electrolytic solution sufficient to form a gel which is effective as an electrolyte.
Claim 3
Dependent Claim
22 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in the claim 1, in which the electrochromic material is tungsten oxide or molybdenum oxide.
Claim 4
Dependent Claim
33 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 1 in which the copolymer is comprised of vinyl acetate and ethylene wherein the vinyl acetate is present in a molar ratio of 70%-80%.
Claim 5
Dependent Claim
45 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in the claim 1, in which the solvent of the electrolyte solution is propylene carbonate, and the first monomer is selected from a member of the group consisting of vinyl acetate, methyl methacrylate, methyl acrylate, vinylpyridine and vinylpyrrolidone.
Claim 6
Dependent Claim
33 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 1, in which said second monomer is selected from a member of the group consisting of styrene, vinyl chloride, ethylene, propylene and vinyl carbazole.
Claim 7
Dependent Claim
21 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 1, in which said copolymer is comprised of vinyl acetate and ethylene.
Claim 8
Dependent Claim
23 words
The electrochomic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 1 wherein the electrolytic solution absorbed by the copolymer is the primary current carrier.
Claim 9
Dependent Claim
82 words
An electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising: at least two electrodes at least one of which is comprised of electrochromic material, and an electrolytic gel in contact with said electrodes and comprising an electrolytic solution absorbed and thereby gelated by a cross-linked polymer which when uncross-linked is soluble in the solvent of said electrolytic solution, and which is cross-linked to an extent which allows the polymer to absorb said electrolytic solution in an amount sufficient to form a gel effective as an electrolyte.
Claim 10
Dependent Claim
82 words
An electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising: at least two electrodes at least one of which is comprised of electrochromic material, and an electrolytic gel in contact with said electrodes and comprising an electrolytic solution absorbed and thereby gelated by a cross-linked polymer which when uncross-linked is soluble in the solvent of said electrolytic solution, and which is cross-linked to an extent which allows the polymer to absorb said electrolytic solution in an amount sufficient to form a gel effective as an electrolyte.
Claim 11
Dependent Claim
19 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in the claim 8, in which the polymer is cross-linked by divinylbenzene.
Claim 12
Dependent Claim
32 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in 8, in which the electrolytic solution is an aqueous solution and the polymer is polyvinyl alcohol cross-linked by a dicarboxylic acid or its anhydride.
Claim 13
Dependent Claim
26 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in the claim 10, in which the cross-linking agent is pyromellitic dianhydride, maleic acid, adipic acid or maleic dianhydride.
Claim 14
Dependent Claim
23 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in the claim 11, in which the pyromellitic dianhydride/polyvinyl alcohol weight ratio is more than 0.02.
Claim 15
Dependent Claim
56 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 8, in which the electrolyte gel is gelated by the polymerization of monomer in a solvent, wherein the resultant polymer is soluble in said solvent and said solvent is used for the electrolytic solution, and in which the polymer is cross-linked by means of a divinyl compound.
Claim 16
Dependent Claim
30 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device which is claimed in claim 13, in which the electrolytic solution is an aqueous solution, the monomer is acrylamide and the divinyl compound is methylenebisacrylamide.
Claim 17
Dependent Claim
32 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 13, in which the solvent of the electrolytic solution is propylene carbonate, the monomer is methyl acrylate, and the divinyl compound is divinylbenzene.
Claim 18
Dependent Claim
32 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 13, in which the solvent of the electrolytic solution is acetonitrile, the monomer is vinyl acetate, and the divinyl compound is divinyl adipate.
Claim 19
Dependent Claim
22 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in the claim 8, in which the electrochromic material is tungsten oxide or molybdenum oxide.
Claim 20
Dependent Claim
24 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 8 in which said polymer is polyacrylamide which has been cross-linked by means of methylenebisacrylamide.
Claim 21
Dependent Claim
23 words
The electrochromic .[.display.]. .Iadd.optical .Iaddend.device as claimed in claim 8 wherein the electrolytic solution absorbed by the polymer is the primary current carrier.
Claim 22
Dependent Claim
83 words
An electrolyte gel useful for an electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising an electrolytic solution absorbed and gelated by a copolymer formed of a first monomer which when polymerized forms polymer soluble in the solvent of said electrolytic solution and a second monomer which when polymerized forms polymer insoluble in the solvent of said electrolytic solution in a proportion such that said copolymer is capable of absorbing an amount of said electrolytic solution sufficient to form a gel which is effective as an electrolyte.
Claim 23
Dependent Claim
83 words
An electrolyte gel useful for an electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising an electrolytic solution absorbed and gelated by a copolymer formed of a first monomer which when polymerized forms polymer soluble in the solvent of said electrolytic solution and a second monomer which when polymerized forms polymer insoluble in the solvent of said electrolytic solution in a proportion such that said copolymer is capable of absorbing an amount of said electrolytic solution sufficient to form a gel which is effective as an electrolyte.
Claim 24
Dependent Claim
56 words
The electrolyte gel as claimed in claim 20 in which the first monomer is selected from a member of the group consisting of vinyl acetate, methyl methacrylate, methyl acrylate, vinylpyridine and vinylpyrrolidone and in which said second monomer is selected from a member of the group consisting of styrene, vinyl chloride, ethylene, propylene and vinyl carbazole.
Claim 25
Dependent Claim
19 words
The electrolyte gel as claimed in claim 20 in which said copolymer is comprised of vinyl acetate and ethylene.
Claim 26
Dependent Claim
61 words
An electrolyte gel useful for an electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising an electrolytic solution absorbed and gelated by a cross-linked polymer which when uncross-linked is soluble in the solvent of said electrolytic solution and which is cross-linked to an extent which allows the polymer to absorb said electrolytic solution in an amount sufficient to form a gel effective as an electrolyte.
Claim 27
Dependent Claim
61 words
An electrolyte gel useful for an electrochromic .[.display.]. .Iadd.optical .Iaddend.device comprising an electrolytic solution absorbed and gelated by a cross-linked polymer which when uncross-linked is soluble in the solvent of said electrolytic solution and which is cross-linked to an extent which allows the polymer to absorb said electrolytic solution in an amount sufficient to form a gel effective as an electrolyte.
Claim 28
Dependent Claim
53 words
The electrolyte gel as claimed in claim 23 in which the electrolyte is gelated by the polymerization of monomer in a solvent, wherein the resultant polymer is soluble in said solvent and said solvent is used for the electrolytic solution, and in which the polymer is cross-linked by means of a divinyl compound.
Claim 29
Dependent Claim
20 words
The electrolyte gel as claimed in claim 24 in which the monomer is acrylamide and the divinyl compound is methylenebisacrylamide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |