US3209450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating semiconductor contacts
Assignee: AT&T Inc
•
Filing: 1962-07-03
•
Granted: 1965-10-05
•
Expires: 1982-07-03
Abstract
No abstract record available.
Inventors
- 👤 Donald L Klein
- 👤 Robert W Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:47
CPC Classifications
H; H10; H10W; H10W72/00; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1640469A
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US2527587A
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GB592733A
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GB622071A
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US2700623A
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US2754238A
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US2746140A
Cited
US3065534A
Cited
US2859512A
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US3046651A
Cited
US3055099A
Cited
US3025439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |