Patent US2646960A successfully refreshed from Google Patents.
US2646960A
Expired / Lapsed
US
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Rotary plug with sealing sleeve
Assignee: ACF Industries Inc
•
Filing: 1949-01-12
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Granted: 1953-07-28
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Expires: 1969-01-12
Abstract
No abstract record available.
Inventors
- 👤 George R Ericson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:31
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/225; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1743116A
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US1926450A
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US1926026A
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US1939141A
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FR840412A
Cited
US2270548A
Cited
US2346052A
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US2414966A
Cited
US2461041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |