Patent US2665929A successfully refreshed from Google Patents.
US2665929A
Expired / Lapsed
US
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Shaft sealing device
Assignee: Individual
•
Filing: 1948-09-10
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Granted: 1954-01-12
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Expires: 1968-09-10
Abstract
No abstract record available.
Inventors
- 👤 John W Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:23
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/42; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/14; F04D29/146; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US876613A
Cited
US1014850A
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US2140356A
Cited
US2133879A
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US2171968A
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US2461655A
Cited
US2407285A
Cited
US2478649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |