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US2485593A
Expired / Lapsed
US
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Rectifier and method of making the same
Assignee: STC PLC
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Filing: 1947-01-03
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Granted: 1949-10-25
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Expires: 1967-01-03
Abstract
No abstract record available.
Inventors
- 👤 Leslie B Haigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
CPC Classifications
H; H10; H10W; H10W72/00; H10D; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB439064A
Cited
US2261618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |