US4088392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic variable optical transmission device with a liquid electrolyte
Assignee: Wyeth Holdings LLC
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Filing: 1976-04-13
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Granted: 1978-05-09
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Expires: 1996-04-13
Abstract
Abstract Electro-optical device useful in control of visible and infrared absorption by windows in homes, commercial buildings and the like, typically comprising in sandwiched arrangement a pair of electrodes, and a film of a transition metal compound and a liquid electrolyte disposed between the electrodes is provided. The device exhibits coloration and bleaching thereof over large areas by control of, the polarity of an applied electric field.
Inventors
- 👤 Marion D. Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
51 words
A variable light transmission device which comprises in combination a layer of a solid persistent electrochromic material in contact with a separate layer of liquid electrolyte, said layer of liquid electrolyte and said layer of solid electrochromic material being disposed between and each contacting one of a pair of conductive electrodes.
Claim 2
Dependent Claim
51 words
A variable light transmission device which comprises in combination a layer of a solid persistent electrochromic material in contact with a separate layer of liquid electrolyte, said layer of liquid electrolyte and said layer of solid electrochromic material being disposed between and each contacting one of a pair of conductive electrodes.
Claim 3
Dependent Claim
18 words
The device of claim 1 wherein the electrochromic material contains at least one element of variable oxidation state.
Claim 4
Dependent Claim
15 words
The device of claim 1 wherein the liquid electrolyte is a strong sulfuric acid solution.
Claim 5
Dependent Claim
17 words
The device of claim 1 wherein the liquid electrolyte is in coextensive contact with the electrochromic material.
Claim 6
Dependent Claim
15 words
The device of claim 1 wherein at least one of the electrodes is substantially transparent.
Claim 7
Dependent Claim
25 words
A device as in claim 5 wherein the counter electrode is positioned so that light may pass through at least part of said transparent electrode.
Claim 8
Dependent Claim
13 words
The device of claim 1 wherein said persistent electrochromic material is tungsten oxide.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |