Patent US3494022A successfully refreshed from Google Patents.
US3494022A
Expired / Lapsed
US
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Method of manufacturing semiconductor devices
Assignee: Telefunken Electronic GmbH
•
Filing: 1967-06-30
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Granted: 1970-02-10
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Expires: 1987-06-30
Abstract
No abstract record available.
Inventors
- 👤 Hans-Jurgen Maute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:44
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/60; H10W70/00; H10W70/01; H10W70/04; H10W70/048; H10W70/40; H10W70/481; H10W72/01; H10W72/0198; H10W72/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3176191A
Cited
US3264715A
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US3171187A
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US3264712A
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US3371836A
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US3367025A
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US3281628A
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US3423516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |