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Patent US2912266A successfully refreshed from Google Patents.
US2912266A
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US
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Valve stem seal
Assignee: Individual
•
Filing: 1955-06-20
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Granted: 1959-11-10
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Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Carl H Nordell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:07
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1191137A
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US1591876A
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US2113098A
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US2468924A
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US2445410A
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US2646959A
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US2587405A
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US2687908A
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US2794662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |