Patent US3927473A successfully refreshed from Google Patents.
Patent US3189973A successfully refreshed from Google Patents.
US3189973A
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US
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Method of fabricating a semiconductor device
Assignee: AT&T Inc
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Filing: 1961-11-27
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Granted: 1965-06-22
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Expires: 1981-11-27
Abstract
No abstract record available.
Inventors
- 👤 Edwards Roger
- 👤 John E Iwersen
- 👤 Howard H Loar
- 👤 Ian M Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
H; H10; H10D; H10D64/00; H10D64/20; H10D64/27; H10D64/281; H10D99/00; H10P; H10P95/00; H10W; H10W74/00; H10W74/40; H10W74/43; Y; Y10; Y10S; Y10S148/00; Y10S148/026; Y10S148/049; Y10S148/122
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |