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US3473974A
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Utilization of trace impurities in the vapor growth of crystals
Assignee: Westinghouse Electric Corp
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Filing: 1967-02-14
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Granted: 1969-10-21
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Expires: 1987-02-14
Abstract
No abstract record available.
Inventors
- 👤 John W Faust Jr
- 👤 Harold F John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:48
CPC Classifications
C; C30; C30B; C30B23/00; C30B23/02; Y; Y10; Y10S; Y10S117/00; Y10S117/903; Y10S117/906; Y10S148/00; Y10S148/016; Y10S148/054; Y10S148/115; Y10S148/148; Y10S252/00; Y10S252/95; Y10S252/951; Y10S438/00; Y10S438/903; Y10S438/914; Y10S438/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |