US2964689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching transistors
Assignee: AT&T Inc
•
Filing: 1958-07-17
•
Granted: 1960-12-13
•
Expires: 1978-07-17
Abstract
No abstract record available.
Inventors
- 👤 Robert C Buschert
- 👤 Solomon L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:35
CPC Classifications
H; H10; H10P; H10P95/00; H10D; H10D99/00; H10P34/00; H10P34/40; Y; Y10; Y10S; Y10S148/00; Y10S148/06; Y10S148/062; Y10S148/145
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2813233A
Cited
US2770761A
Cited
US2790940A
Cited
US2810870A
Cited
US2861018A
Cited
US2792540A
Cited
US2879190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |