US3406049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epitaxial semiconductor layer as a diffusion mask
Assignee: International Business Machines Corp
•
Filing: 1965-04-28
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Granted: 1968-10-15
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Expires: 1985-04-28
Abstract
No abstract record available.
Inventors
- 👤 John C Marinace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/06; C30B31/18; C30B31/185; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/065; Y10S148/106; Y10S148/122; Y10S148/145; Y10S438/00; Y10S438/942; Y10S438/945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3183129A
Cited
US3243323A
Cited
US3171762A
Cited
US3275910A
Cited
US3165430A
Cited
US3299330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |