US3477959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing doped,monocrystalline semiconductor materials
Assignee: Nortel Networks Ltd
•
Filing: 1967-04-24
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Granted: 1969-11-11
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Expires: 1987-04-24
Abstract
No abstract record available.
Inventors
- 👤 Douglas Roy Colton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:50
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/08; C30B13/10; C30B13/12; Y; Y10; Y10S; Y10S148/00; Y10S148/107; Y10S252/00; Y10S252/95; Y10S252/951
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3036892A
Cited
US3141848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |