Patent US2672854A successfully refreshed from Google Patents.
US2672854A
Expired / Lapsed
US
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Air-cooled valve
Assignee: Individual
•
Filing: 1949-04-02
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Granted: 1954-03-23
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Expires: 1969-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jacob Z Brubaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:51
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/12; F01L3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1277644A
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US1377407A
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US1541207A
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US1873119A
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US1950467A
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US2063779A
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US2065106A
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US2246280A
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US2360600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |