US3233305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching transistors with controlled emitter-base breakdown
Assignee: International Business Machines Corp
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Filing: 1961-09-26
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Granted: 1966-02-08
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Expires: 1981-09-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Dill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:31
CPC Classifications
H; H10; H10D; H10D99/00; H10D10/00; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/007; Y10S148/039; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3025589A
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US2964689A
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US3067485A
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US3027503A
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US3006791A
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US3015048A
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US3089794A
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US3149395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |