US2971783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary seal
Assignee: CITY NAT BANK AND TRUST COMPAN
•
Filing: 1957-03-04
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Granted: 1961-02-14
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Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 William F Laser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:36
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US811934A
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US2373463A
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US2479711A
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US2622449A
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US2705653A
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US2761709A
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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 |