US2903660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed rectifier units for t.r. cells
Assignee: British Thomson Houston Co Ltd
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Filing: 1957-03-07
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Granted: 1959-09-08
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Expires: 1977-03-07
Abstract
No abstract record available.
Inventors
- 👤 Scott William Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:29
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01J; H01J17/00; H01J17/02; H01J17/04; H10; H10D; H10D99/00
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) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |