US3589896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical article employing electrochromic and photoconductive materials
Assignee: United States Department of the Air Force
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Filing: 1968-05-27
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Granted: 1971-06-29
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Expires: 1988-05-27
Abstract
Abstract THE SWITCHING OF ELECTROCHROMIC MATERIALS BY MEANS OF ELECTRON BEAM OR LIGHT BEAM EXCITED SUSTANINED BOMBARDMENT INDUCED CONDUCTIVITY (SBIC) MATERIALS IN WHICH THE ELECTROCHROMIC MATERIAL BECOMES DARK AT THOSE POINTS ADDRESSED WITH THE ELECTRON BEAM OR BEAM OF LIGHT. THIS ELECTROCHROMIC MATERIAL CAN ALSO BE ERASED COMPLETELY OR SELECTIVELY.
Inventors
- 👤 David E Wilcox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:59
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/14; C; C09; C09K; C09K9/00; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 0
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |