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US2811981A
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Butterfly valve with a rotatable eccentric bearing mounting
Assignee: Individual
•
Filing: 1953-01-26
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Granted: 1957-11-05
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Expires: 1973-01-26
Abstract
No abstract record available.
Inventors
- 👤 Harris Florence Mary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:59
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/24; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1213513A
Cited
US1656183A
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US1669119A
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US1904467A
Cited
GB373478A
Cited
FR785155A
Cited
US2517596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |