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US2844770A
Expired / Lapsed
US
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Semi-conductive device and method of producing same
Assignee: US Philips Corp
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Filing: 1955-05-16
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Granted: 1958-07-22
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Jan Coenraad Van Vessem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:03
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; H10D10/00; H10D99/00; H10P; H10P10/00; H10P95/00; H10P95/50; H10W; H10W74/00; H10W74/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2612567A
Cited
US2717341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |