Patent US3492969A successfully refreshed from Google Patents.
US3492969A
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Apparatus for indiffusing impurity in semiconductor members
Assignee: Siemens AG
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Filing: 1967-02-24
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Granted: 1970-02-03
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Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Reimer Emeis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:10
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/16; C30; C30B; C30B31/00; C30B31/06; C30B31/10; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S118/00; Y10S118/90
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |