US2172232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preservative and contact coating for light sensitive devices
Assignee: Westinghouse Electric Corp
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Filing: 1936-03-05
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Granted: 1939-09-05
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Expires: 1956-03-05
Abstract
No abstract record available.
Inventors
- 👤 Earl D Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:23
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/20; H10F77/206; H10F77/241; H10D; H10D48/00; H10D48/01; H10D48/07; H10D99/00; H10F77/50; H10F99/00
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) | 1942-09-04 | 1943-03-06 | 1943-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-04 | 1947-03-06 | 1947-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-04 | 1951-03-06 | 1951-09-05 | $7700.00 | Window Closed / Lapsed |