US2849665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high power transistor
Assignee: Westinghouse Electric Corp
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Filing: 1955-10-17
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Granted: 1958-08-26
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 John L Boyer
- 👤 August P Colaiaco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:51
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H10D; H10D99/00; H10W40/00; H10W40/20; H10W40/22; H10W40/226
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |