US3428500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of epitaxial deposition on one side of a substrate with simultaneous vapor etching of the opposite side
Assignee: Fujitsu Ltd
•
Filing: 1965-04-21
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Granted: 1969-02-18
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Expires: 1985-04-21
Abstract
No abstract record available.
Inventors
- 👤 Kazuo Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:53
CPC Classifications
H; H10; H10P; H10P50/00; H10P50/20; H10P50/24; H10P50/242; H10P50/246; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/051; Y10S148/052; Y10S438/00; Y10S438/913; Y10S438/977
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3142596A
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US3172792A
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US3261727A
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US3243323A
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FR1364522A
Cited
US3291657A
Cited
FR1374096A
Cited
US3316130A
Cited
US3341374A
Cited
US3366520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |