US2858489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transistor
Assignee: Westinghouse Electric Corp
•
Filing: 1955-11-04
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Granted: 1958-10-28
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Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Henkels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
CPC Classifications
H; H10; H10D; H10D10/00; H10D1/00; H10D1/40; H10D48/00; H10D48/30; H10D48/38; H10D84/00; H10D84/60; H10D84/645; H10D99/00; H10P; H10P10/00; H10P32/00; H10P32/10; H10P32/12; H10P32/17; H10P32/171; H10P95/00; H10W; H10W20/00; H10W20/40; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/167; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2345122A
Cited
US2680220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |