Patent US2423642A successfully refreshed from Google Patents.
US2423642A
Expired / Lapsed
US
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Diaphragm shaft seal
Assignee: Tuthill Pump Co
•
Filing: 1944-08-31
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Granted: 1947-07-08
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Expires: 1964-08-31
Abstract
No abstract record available.
Inventors
- 👤 Endebak Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:39
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1598564A
Cited
GB245548A
Cited
US2163127A
Cited
US2051301A
Cited
US2216218A
Cited
US2249930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |