US2743869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion control system
Assignee: Republic Flow Meters Co
•
Filing: 1953-06-03
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Granted: 1956-05-01
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Expires: 1973-06-03
Abstract
No abstract record available.
Inventors
- 👤 Charles H Smoot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:15
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/08; F23N1/10; F23N1/105; F23N2225/00; F23N2225/04; F23N2225/06; F23N2235/00; F23N2235/02; F23N2235/06; F23N2235/12; F23N2235/14; F23N2237/00; F23N2237/02; F23N5/00; F23N5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1735678A
Cited
US2143820A
Cited
US2243944A
Cited
US1338922A
Cited
US1975086A
Cited
US2623698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |