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US4586792A
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Electronic display element
Assignee: PROVIDENCE PLANTATIONS
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Filing: 1984-08-31
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Granted: 1986-05-06
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Expires: 2004-08-31
Abstract
Abstract An electronic display device having a polyaniline film coated on a transparent electrode. The film has electrochromic properties and will display at least three distinct reproducible color changes.
Inventors
- 👤 Sze C. Yang
- 👤 Richard R. Durand, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:08
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525; G02F1/1516; G02F1/15165
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
60 words
An electronic display element which comprises: first and second electrodes in electrolytic communication at least one of said electrodes being transparent; a polymer formed from monomeric aniline coated on one of said electrodes the polymer characterized in that it will display at least three distinct color changes in response to voltages applied to the electrodes which color changes are reproduceable.
Claim 2
Dependent Claim
60 words
An electronic display element which comprises: first and second electrodes in electrolytic communication at least one of said electrodes being transparent; a polymer formed from monomeric aniline coated on one of said electrodes the polymer characterized in that it will display at least three distinct color changes in response to voltages applied to the electrodes which color changes are reproduceable.
Claim 3
Dependent Claim
13 words
The display element of claim 1 wherein the electrodes are transparent conductive coatings.
Claim 4
Dependent Claim
14 words
The display element of claim 2 wherein the transparent conductive coatings are metal coatings.
Claim 5
Dependent Claim
25 words
The display element of claim 3 wherein the transparent conductive coatings are selected from the group consisting of tin oxide, indium oxide, gold and/or platinum.
Claim 6
Dependent Claim
31 words
The display element of claim 1 wherein the electrolyte is selected from the group consisting of trifluoroacetate, trifluoromethane sulfonate, trifluoroacetic acid, sodium trifluoroacetate, hydrochloric acid, potassium chloride and/or phthalate buffer solutions.
Claim 7
Dependent Claim
76 words
The display element of claim 1 wherein the polymer is formed by the polymerization of the monomers selected from the group consisting of: ##STR5## wherein R 1 -R 8 =any one of the following groups: --H, --(CH 2 ) n CH 3 (n=o to 10), --OCH 3 , --OC 2 H 5 --Cl, --F, --Br, --I, --CN, --SO 3 H, ##STR6## (where m, n, 1=0 to 5 and X=any of the above groups that define R1-R8).
References Cited (Backward Citations)
US4009936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |