US3978007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simple, bonded graphite counter electrode for EC devices
Assignee: Wyeth Holdings LLC
•
Filing: 1973-11-23
•
Granted: 1976-08-31
•
Expires: 1993-11-23
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
- 👤 Robert Domenico Giglia
- 👤 Richard Howard Clasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:38
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
A method for forming a counter-electrode comprising graphite and a persistent electrochromic material, which comprises the steps of forming a layer of an admixture of graphite with a binder selected from silicates, epoxies, polesters and polyethylenes, heat curing said binder, and applying to said admixture of graphite binder said persistent electrochromic material admixed with ammonium hydroxide.
Claim 2
Independent Claim
56 words
A method for forming a counter-electrode comprising graphite and a persistent electrochromic material, which comprises the steps of forming a layer of an admixture of graphite with a binder selected from silicates, epoxies, polesters and polyethylenes, heat curing said binder, and applying to said admixture of graphite binder said persistent electrochromic material admixed with ammonium hydroxide.
Claim 3
Dependent Claim
24 words
The method of claim 1, wherein said admixture of graphite and a binder is admixed with said electrochromic material before heat curing said binder.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said curing is at elevated temperature.
Claim 5
Dependent Claim
10 words
A composition as formed by the method of claim 1.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |