US2983854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive device
Assignee: AT&T Inc
•
Filing: 1960-04-05
•
Granted: 1961-05-09
•
Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 Gerald L Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:37
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D62/00; H10D62/10; H10D8/00; H10D8/70; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2918628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |