US3139362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing semiconductive devices
Assignee: AT&T Inc
•
Filing: 1961-12-29
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Granted: 1964-06-30
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Expires: 1981-12-29
Abstract
No abstract record available.
Inventors
- 👤 Asaro Lucian A D
- 👤 Rudolf G Frieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/12; H10P32/17; H10P32/174; Y; Y10; Y10S; Y10S148/00; Y10S148/056; Y10S438/00; Y10S438/914; Y10S438/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |