US2889498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor rectifier assembly
Assignee: Westinghouse Electric Corp
•
Filing: 1955-11-08
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Granted: 1959-06-02
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Expires: 1975-11-08
Abstract
No abstract record available.
Inventors
- 👤 John L Boyer
- 👤 Herbert C Mcwilliams
- 👤 August P Colaiaco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:38
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H10; H10P; H10P95/00; H10W; H10W40/00; H10W40/40; H10W40/47; H10W72/00; H10W72/20; H10W90/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB296666A
Cited
US2353461A
Cited
US2754455A
Cited
US2730663A
Cited
US2725505A
Cited
US2751528A
Cited
US2756374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |