US2958721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
R. f. constant impedance end seal
Assignee: Individual
•
Filing: 1957-05-20
•
Granted: 1960-11-01
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Owen O Fiet
- 👤 Richard H Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:55
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USRE23679E
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US990234A
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US1491325A
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US1603991A
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US1851940A
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US1850040A
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US2123061A
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US2310351A
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US2322233A
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US2357591A
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US2514911A
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US2545945A
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US2831047A
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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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |