US3540951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for doping semiconductor crystals with phosphorus
Assignee: Siemens AG
•
Filing: 1968-04-22
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Granted: 1970-11-17
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Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Erich Pammer
- 👤 Hans Christ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:55
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/19; C; C30; C30B; C30B29/00; C30B29/02; C30B29/06; C30B31/00; C30B31/06; C30B31/08; Y; Y10; Y10S; Y10S252/00; Y10S252/95; Y10S252/951
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3226612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |