US4068928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of an electrode structure containing WO3 use of the structure in an electrochromic cell
Assignee: Wyeth Holdings LLC
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Filing: 1976-07-01
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Granted: 1978-01-17
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Expires: 1996-07-01
Abstract
Abstract A counter electrode structure of a transition metal electrochromic compound for use in an electro-optical device, which is useful in control of visible and infrared absorption by windows, in data display devices and the like, typically comprising in sandwich arrangement a pair of electrodes, and disposed therebetween, a layer of transition metal electrochromic compounds and a semi-solid highly conductive sulfuric acid gel electrolyte, one of the electrodes being said counter electrode. The gel exhibits good conductivity, stability and compatibility with the electrochromic layers. The present counter electrode is more efficient and has a longer lifetime.
Inventors
- 👤 Marion Douglas Meyers
- 👤 Henry Patrick Landi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
A method for forming a counter-electrode for an electrochromic variable light transmission device comprising: admixing a persistent electrochromic material with a plasticizer, a polyfluoroalkylene compound, and an electrically conductive material; forming sheets of the admixture; and pressing at least one of said sheets onto a planar electrically conductive support.
Claim 2
Independent Claim
49 words
A method for forming a counter-electrode for an electrochromic variable light transmission device comprising: admixing a persistent electrochromic material with a plasticizer, a polyfluoroalkylene compound, and an electrically conductive material; forming sheets of the admixture; and pressing at least one of said sheets onto a planar electrically conductive support.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said admixture is heat-blended and formed into sheets, and said sheets are heat-pressed onto a grid.
Claim 4
Dependent Claim
41 words
The method of claim 2 wherein the counter-electrode assembly of said sheets on said grid is cooled while maintaining pressure, and said assembly is treated with a solvent to extract said plasticizer, whereafter said assembly is washed with water and dried.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |