Patent US3175975A successfully refreshed from Google Patents.
US3175975A
Expired / Lapsed
US
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Heat treatment of iii-v compound semiconductors
Assignee: AT&T Inc
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Filing: 1962-04-19
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Granted: 1965-03-30
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Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Calvin S Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:27
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/06; Y; Y10; Y10S; Y10S252/00; Y10S252/95; Y10S438/00; Y10S438/909
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |