Patent US2322702A successfully refreshed from Google Patents.
US4021100A
Expired / Lapsed
US
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Electrochromic device having an electrolyte contained in a solid porous insulating layer
Assignee: Wyeth Holdings LLC
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Filing: 1976-04-23
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Granted: 1977-05-03
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Expires: 1996-04-23
Abstract
Abstract An electrochromic data display and light modulating device which may be formed by sandwich arrangement of the imaging or light modulating layer and the counter-electrode layer, with a suitable porous insulating layer between, and an electrolyte permeating the porous insulating layer.
Inventors
- 👤 Robert Domenico Giglia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1506; G02F1/1508
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
In a variable light transmission device which comprises a conductive light transmitting substrate having a layer of a persistent electrochromic material as a light modulating material, a counter-electrode, and an ion conducting layer, an improved ion conducting layer comprising a solid layer of porous electrical insulating material as a support surface in contact with said persistent electrochromic material and said counter-electrode and an electrolyte means to permeate said support surface.
Claim 2
Dependent Claim
70 words
In a variable light transmission device which comprises a conductive light transmitting substrate having a layer of a persistent electrochromic material as a light modulating material, a counter-electrode, and an ion conducting layer, an improved ion conducting layer comprising a solid layer of porous electrical insulating material as a support surface in contact with said persistent electrochromic material and said counter-electrode and an electrolyte means to permeate said support surface.
Claim 3
Dependent Claim
33 words
The variable light transmission device as in claim 1, which comprises a layered arrangement of the persistent electrochromic material and the electrolyte wetted porous insulating layer, disposed between the pair of conductive electrodes.
Claim 4
Dependent Claim
19 words
The variable light transmission device of claim 1, wherein said solid layer of porous insulating material is aluminum oxide.
Claim 5
Dependent Claim
19 words
The variable light transmission device of claim 1, wherein said solid layer of porous insulating material is silicon oxide.
Claim 6
Dependent Claim
19 words
The variable light transmission device of claim 1, wherein said solid layer of porous insulating material is porous glass.
Claim 7
Dependent Claim
16 words
The variable light transmission device of claim 1, wherein said electrolyte means is an acid solution.
Claim 8
Dependent Claim
17 words
The variable light transmission device of claim 6, wherein said electrolyte means is a sulfuric acid solution.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |