US2993154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor switch
Assignee: AT&T Inc
•
Filing: 1960-06-10
•
Granted: 1961-07-18
•
Expires: 1980-06-10
Abstract
No abstract record available.
Inventors
- 👤 James M Goldey
- 👤 Ian M Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:43
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10D1/00; H10D1/40; H10D10/00; H10D18/00; H10D18/60; H10D18/80; H10D62/00; H10D62/10; H10D62/13; H10D62/17; H10D64/00; H10D64/20; H10D64/23; H10D84/00; H10D84/60; H10D84/645; H10D99/00; H10P; H10P95/00; H10P95/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2838617A
Cited
US2855524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |