US3847468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonia-treated electrochromic (ec) electrodes
Assignee: Wyeth Holdings LLC
•
Filing: 1972-12-07
•
Granted: 1974-11-12
•
Expires: 1992-12-07
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 Clasen
- 👤 R Giglia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
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
35 words
A VARIABLE LIGHT TRANSMISSION DEVICE WHICH COMPRISES TWO LAYERS, ONE AN AMMONIA TREATED IMAGING PERSISTENT ELECTROCHROMIC MATERIAL, AND THE OTHER OF A COUNTERELECTRODE SEPARATED BY AN ELECTROLYTE LAYER DISPOSED BETWEEN A PAIR OF CONDUCTIVE ELECTRODES.
Claim 2
Dependent Claim
35 words
A VARIABLE LIGHT TRANSMISSION DEVICE WHICH COMPRISES TWO LAYERS, ONE AN AMMONIA TREATED IMAGING PERSISTENT ELECTROCHROMIC MATERIAL, AND THE OTHER OF A COUNTERELECTRODE SEPARATED BY AN ELECTROLYTE LAYER DISPOSED BETWEEN A PAIR OF CONDUCTIVE ELECTRODES.
Claim 3
Dependent Claim
13 words
The device of claim 1, wherein said counterelectrode is a persistent electrochromic material.
Claim 4
Dependent Claim
16 words
The device of claim 2, wherein the presistent electrochromic materials in each said layer are identical.
Claim 5
Dependent Claim
21 words
The device of claim 2 wherein either one or both of said electrochromic imaging layer or counterelectrode is treated with ammonia.
Claim 6
Dependent Claim
15 words
The device of claim 1, wherein at least one of said electrodes is substantially transparent.
Claim 7
Dependent Claim
13 words
The device of claiM 5 wherein said persistent electrochromic material is tungsten oxide.
Claim 8
Dependent Claim
29 words
A process which comprises subjecting the device of claim 1 to electric current flow of alternating polarity whereby coloration and erase cycles are obtained without change in voltage-time characteristics.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |