Patent US3426254A successfully refreshed from Google Patents.
US3426254A
Expired / Lapsed
US
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Transistors and method of manufacturing the same
Assignee: Sprague Electric Co
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Filing: 1965-06-21
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Granted: 1969-02-04
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Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph G F Bouchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:46
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/01; H10D84/0112; H10D84/02; H10D84/03; H10D84/038; H10D84/60; H10D84/67; H10D84/673; H10D99/00; Y; Y10; Y10S; Y10S148/00; Y10S148/085; Y10S148/096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB916346A
Cited
US3260902A
Cited
US3197710A
Cited
US3305913A
Cited
US3325707A
Cited
US3327182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |