Patent US3535170A successfully refreshed from Google Patents.
US3535170A
Expired / Lapsed
US
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High voltage n-p-n transistors
Assignee: ZF International UK Ltd
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Filing: 1968-03-07
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Granted: 1970-10-20
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Expires: 1988-03-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas Lawrence Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:44
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/12; H10D; H10D99/00; H10P32/17; H10P32/171; Y; Y10; Y10S; Y10S148/00; Y10S148/026; Y10S148/043; Y10S148/051; Y10S148/085; Y10S148/118; Y10S148/151; Y10S438/00; Y10S438/914; Y10S438/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3210225A
Cited
US3249831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |