US2650842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft sealing device
Assignee: CASSMAN Manufacturing CO
•
Filing: 1948-12-16
•
Granted: 1953-09-01
•
Expires: 1968-12-16
Abstract
No abstract record available.
Inventors
- 👤 Wilfred M Coopman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:37
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1025884A
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US2010930A
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US1927543A
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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) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |