US3479736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a semiconductor device
Assignee: Hitachi Ltd
•
Filing: 1967-08-17
•
Granted: 1969-11-25
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Expires: 1987-08-17
Abstract
No abstract record available.
Inventors
- 👤 Hisashi Toki
- 👤 Takashi Agatsuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:26
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10P; H10P14/00; H10P14/40; H10P14/46; H10P95/00; H10W20/00; H10W20/40; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; Y; Y10; Y10S; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2793420A
Cited
US3169892A
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US2981877A
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US3319311A
Cited
US3328216A
Cited
US3362851A
Cited
US3237271A
Cited
US3366519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |