Patent US2950567A successfully refreshed from Google Patents.
US2680220A
Expired / Lapsed
US
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Crystal diode and triode
Assignee: International Standard Electric Corp
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Filing: 1951-05-26
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Granted: 1954-06-01
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Expires: 1971-05-26
Abstract
No abstract record available.
Inventors
- 👤 Starr Arthur Tisso
- 👤 White Charles De Boismaison
- 👤 Cinderey Norman Sidney
- 👤 Matthews Kenneth Albert
- 👤 Cooke Reginald Benjami William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:33
CPC Classifications
H; H10; H10D; H10D99/00; H10D64/00; H10D64/20; H10D64/23; H10W; H10W72/00; H10W74/00; H10W74/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2359801A
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US2314104A
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US2495716A
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US2369185A
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US2434967A
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US2444385A
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US2524033A
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US2524035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |