US3843232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochromic light modulating devices having a palladium counter electrode
Assignee: Wyeth Holdings LLC
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Filing: 1973-02-16
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Granted: 1974-10-22
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Expires: 1993-02-16
Abstract
Abstract Electro-optical device useful in control of visible and infrared absorption by windows in homes, commercial buildings and the like, and for information display 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, wherein the counter-electrode is palladium. The device exhibits coloration and bleaching thereof over large areas by control of the polarity of an applied electric field.
Inventors
- 👤 D Berets
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:48
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
A VARIABLE LIGHT TRANSMISSION DEVICE WHICH COMPRISES IN COMBINATION AN ELECTRODE, A PERSISTENT ELECTROCHROMIC MATERIAL, AND A PALLADIUM COUNTER-ELECTRODE CAPABLE OF SORBING AND DESORBING HYDROGEN.
Claim 2
Dependent Claim
25 words
A VARIABLE LIGHT TRANSMISSION DEVICE WHICH COMPRISES IN COMBINATION AN ELECTRODE, A PERSISTENT ELECTROCHROMIC MATERIAL, AND A PALLADIUM COUNTER-ELECTRODE CAPABLE OF SORBING AND DESORBING HYDROGEN.
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
13 words
The device of claim 1 wherein said persistent electrochromic material is tungsten oxide.
Claim 5
Dependent Claim
20 words
The device of claim 1 wherein said device contains an ion conductive medium between said electrochromic layer and said counter-electrode.
Claim 6
Dependent Claim
16 words
The device of claim 4 wherein the ion conductive medium is a strong sulfuric acid solution.
Claim 7
Dependent Claim
18 words
The device of claim 4 wherein the ion conductive medium is in coextensive contact with the electrochromic material.
Claim 8
Dependent Claim
15 words
The device of claim 1 wherein at least one of the electrodes is substantially transparent.
Claim 9
Dependent Claim
25 words
A device as in claim 7 wherein said counter electrode is positioned so that light may pass through at least part of said transparent electrode.
Claim 10
Dependent Claim
19 words
The device of claim 1 wherein said device has an insulating layer between said electrochromic layer and said counter-electrode.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |