US2707945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer for overhead valves
Assignee: Individual
•
Filing: 1950-06-05
•
Granted: 1955-05-10
•
Expires: 1970-06-05
Abstract
No abstract record available.
Inventors
- 👤 Hughes Hugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:44
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/146; F01L1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1111462A
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US1182632A
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US1363060A
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US1410771A
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US1448687A
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US1623863A
Cited
US1979348A
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US1988212A
Cited
US2030345A
Cited
US2225265A
Cited
US2525791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |