Patent US2657538A successfully refreshed from Google Patents.
US2657538A
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Toric fluid displacement chamber and packing therefor
Assignee: Individual
•
Filing: 1945-12-05
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Granted: 1953-11-03
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Expires: 1965-12-05
Abstract
No abstract record available.
Inventors
- 👤 Edward C Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:17
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/12; F15B15/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1108952A
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FR528463A
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US1361471A
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US1621858A
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DE485545C
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US1917180A
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US2259432A
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US2389654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |