Patent US3442701A successfully refreshed from Google Patents.
US3442701A
Expired / Lapsed
US
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Method of fabricating semiconductor contacts
Assignee: AT&T Inc
•
Filing: 1965-05-19
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Granted: 1969-05-06
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Martin P Lepselter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:04
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/43; H10P; H10P95/00; H10W20/00; H10W20/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3169892A
Cited
US2973466A
Cited
US3106489A
Cited
US3221199A
Cited
US3231421A
Cited
US3237271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |