US2633489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal valve or rectifier
Assignee: General Electric Co
•
Filing: 1952-03-25
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Granted: 1953-03-31
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Expires: 1972-03-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Kinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:46
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J5/44; C; C03; C03C; C03C27/00; C03C27/04; C03C27/042; C03C27/044; H10; H10W; H10W72/00; H10W76/00; H10W76/10; H10W76/12; H10W76/15
Claims Analysis
Total Claims: 0
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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) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |