US2697805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Point contact rectifier
Assignee: GTE Sylvania Inc
•
Filing: 1949-02-05
•
Granted: 1954-12-21
•
Expires: 1969-02-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph B Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/161; H01; H01J; H01J5/00; H01J5/32; H01J5/40; H01J5/42; H10W72/00; H01J2893/00; H01J2893/0033; H01J2893/0034
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2475940A
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US2603692A
Cited
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Cited
US2572993A
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US2626985A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |