Patent US3465428A successfully refreshed from Google Patents.
US3465428A
Expired / Lapsed
US
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Method of fabricating semiconductor devices and the like
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1966-10-27
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Granted: 1969-09-09
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Rueben S Spriggs
- 👤 Arthur J Learn
- 👤 John A Scott-Monck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:45
CPC Classifications
H; H10; H10D; H10D30/00; H10D30/202; H10D48/00; H10D48/30; H10D48/32; H10D48/36; H10D48/362; H10D99/00; H10N; H10N70/00; H10P; H10P95/00
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) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |