Patent US2531402A successfully refreshed from Google Patents.
US2531402A
Expired / Lapsed
US
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Manufacture of dry rectifiers
Assignee: International Standard Electric Corp
•
Filing: 1947-05-29
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Granted: 1950-11-28
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Expires: 1967-05-29
Abstract
No abstract record available.
Inventors
- 👤 Cooper Cedric Lipton
- 👤 Ellison Leslie James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:26
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1744; Y10T156/1751; Y10T156/1754; Y10T156/1759; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53191; Y10T29/53265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2352926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |