US3549401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electroluminescent gallium phosphide diodes
Assignee: International Business Machines Corp
•
Filing: 1966-12-20
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Granted: 1970-12-22
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Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Leonard J Buszko
- 👤 Luther M Foster
- 👤 Max R Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/822; H10H20/824; C; C30; C30B; C30B19/00; C30B19/06; C30B19/061; H10P; H10P14/00; H10P14/20; H10P14/26; H10P14/263; H10P14/265; H10P14/34; H10P14/3402; H10P14/3414; H10P14/3418; H10P14/3438; H10P14/3441; H10P14/3446; Y; Y10; Y10S; Y10S148/00; Y10S148/107
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |