Patent US2335315A successfully refreshed from Google Patents.
US2646536A
Expired / Lapsed
US
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Rectifier
Assignee: Purdue Research Foundation
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Filing: 1946-11-14
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Granted: 1953-07-21
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Expires: 1966-11-14
Abstract
No abstract record available.
Inventors
- 👤 Benzer Seymour
- 👤 Lark-Horovitz Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:55
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/20; H10D64/23; G; G01; G01R; G01R31/00; G01R31/26; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10P; H10P95/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528; Y10T428/12674; Y10T428/12771; Y10T428/12861; Y10T428/12889
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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |