US3827784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simple, bonded graphite counter electrode for electrochromic devices
Assignee: Wyeth Holdings LLC
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Filing: 1971-12-09
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Granted: 1974-08-06
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Expires: 1991-12-09
Abstract
Abstract Method for forming a counter-electrode or imaging area in an electro-optical data display and imaging device, and the electrode and imaging areas formed. An electrochromic data display and imaging device may be formed by sandwich arrangement of the imaging area, the counter-electrode area with a suitable layer between. The device exhibits superior electrochromic reversability and improved speed and cell life over prolonged coloration and erase cycles.
Inventors
- 👤 R Giglia
- 👤 R Clasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
22 words
The device of claim 1, wherein said bonded counter-electrode includes an additional material which is the same as the persistent electrochromic material.
Claim 2
Dependent Claim
15 words
The device of claim 2, wherein the electrochromic materials in each said layer are identical.
Claim 3
Dependent Claim
13 words
The device of claim 2 wherein said persistent electrochromic material is tungstic oxide.
Claim 4
Dependent Claim
15 words
The device of claim 1, wherein at least one of the electrodes is substantially transparent.
Claim 5
Dependent Claim
13 words
The device of claim 1 wherein said persistent electrochromic material is tungstic oxide.
Claim 6
Dependent Claim
13 words
The device of claim 1 wherein said ion conducting layer contains sulfuric acid.
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |