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US2972029A
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Assignee: TANN CORP
•
Filing: 1957-03-06
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Granted: 1961-02-14
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Expires: 1977-03-06
Abstract
No abstract record available.
Inventors
- 👤 Stanford R Ovshinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:55
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/288; H01H1/00; H01H1/06; H01H1/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US680704A
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US781993A
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US1225507A
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US1348842A
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US2015156A
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US2660640A
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US2687500A
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US2668884A
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US2715166A
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US2770697A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |