US2848665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Point contact transistor and method of making same
Assignee: International Business Machines Corp
•
Filing: 1953-12-30
•
Granted: 1958-08-19
•
Expires: 1973-12-30
Abstract
No abstract record available.
Inventors
- 👤 John B Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10D99/00; H10P; H10P10/00; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711974A
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US2071240A
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US2521648A
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US2619414A
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US2609429A
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US2762954A
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US2773224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |