Patent US4425410A successfully refreshed from Google Patents.
US3540941A
Expired / Lapsed
US
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Method of heat treating semiconductor electroluminescent devices
Assignee: International Business Machines Corp
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Filing: 1967-12-01
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Granted: 1970-11-17
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Expires: 1987-12-01
Abstract
No abstract record available.
Inventors
- 👤 Max R Lorenz
- 👤 Aare Onton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:52
CPC Classifications
H; H10; H10P; H10P95/00; H10H; H10H20/00; H10H20/80; Y; Y10; Y10S; Y10S148/00; Y10S148/107; Y10S148/119; Y10S438/00; Y10S438/914; Y10S438/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3365630A
Cited
US3470038A
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 |