US4006966A
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: 1975-04-04
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Granted: 1977-02-08
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Expires: 1995-04-04
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
2026-10-26 18:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524; G02F1/153; G02F1/155; G02F2001/1555
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
In a variable light modulating device comprising a layer of persistent electrochromic material as a light modulating material, a counter-electrode, an electrolyte material in contact with said light modulating material and said counter-electrode, the improvement being a counter-electrode comprising a sheet of an admixture of a persistent electrochromic material, a fibrillated plastic binder and an electrically conductive material pressed onto a planar electrically conductive support.
Claim 2
Dependent Claim
65 words
In a variable light modulating device comprising a layer of persistent electrochromic material as a light modulating material, a counter-electrode, an electrolyte material in contact with said light modulating material and said counter-electrode, the improvement being a counter-electrode comprising a sheet of an admixture of a persistent electrochromic material, a fibrillated plastic binder and an electrically conductive material pressed onto a planar electrically conductive support.
Claim 3
Dependent Claim
37 words
The variable light transmission device of claim 1 wherein said counter-electrode is a structure comprising a layer of persistent electrochromic material in a fibrillated plastic binder pressed onto each side of a planar electrically conductive metal grid.
Claim 4
Dependent Claim
25 words
The variable light transmission device of claim 2 wherein the counter-electrode persistent electrochromic material is tungsten oxide and the metal grid is a tantalum grid.
Claim 5
Dependent Claim
54 words
An electrode structure for an electrochromic light modulating device, said electrode comprising a planar electrically conductive metal grid having a solid layer pressed onto each side, said layer comprising a mixture of a solid, persistent electrochromic material, a fibrillated polymer, and an electrically conductive form of carbon, said layers being heat-pressed onto said grid.
Claim 6
Dependent Claim
54 words
An electrode structure for an electrochromic light modulating device, said electrode comprising a planar electrically conductive metal grid having a solid layer pressed onto each side, said layer comprising a mixture of a solid, persistent electrochromic material, a fibrillated polymer, and an electrically conductive form of carbon, said layers being heat-pressed onto said grid.
Claim 7
Dependent Claim
14 words
The electrode structure of claim 4 wherein said fibrillated polymer is a polyfluoroalkylene compound.
Claim 8
Dependent Claim
24 words
The electrode structure of claim 5 wherein said polyfluoroalkylene is at least one member of the group consisting of polytetrafluorethylene, polyhexafluropropylene, and copolymers thereof.
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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |