Patent US2869054A successfully refreshed from Google Patents.
US2869054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unipolar transistor
Assignee: International Business Machines Corp
•
Filing: 1956-11-09
•
Granted: 1959-01-13
•
Expires: 1976-11-09
Abstract
No abstract record available.
Inventors
- 👤 Gardiner L Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:37
CPC Classifications
H; H10; H10D; H10D62/00; H10D30/00; H10D30/80; H10D62/01; H10D99/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2790037A
Cited
US2784121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-12 | 1962-07-14 | 1963-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-12 | 1966-07-14 | 1967-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-12 | 1970-07-14 | 1971-01-13 | $7700.00 | Window Closed / Lapsed |