Patent US2805837A successfully refreshed from Google Patents.
US2805837A
Expired / Lapsed
US
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Butterfly valves
Assignee: ATI Ladish Co Inc
•
Filing: 1952-11-19
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Granted: 1957-09-10
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Expires: 1972-11-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:01
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US160496A
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US1188462A
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US1120975A
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US1490039A
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US1744798A
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US1849152A
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DE613700C
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US2355017A
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US2412330A
Cited
US2552117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |