US2671503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for auxiliary draft fluid-fuel-fired heating apparatus
Assignee: Gilbarco Inc
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Filing: 1951-12-08
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Granted: 1954-03-09
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Expires: 1971-12-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Logan
- 👤 Mac-Donnell James Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:59
CPC Classifications
F; F23; F23L; F23L17/00; F23L17/005; F23N; F23N5/00; F23N5/20; F23N5/203; F24; F24C; F24C15/00; F23N2223/00; F23N2223/30; F23N2227/00; F23N2227/02; F23N2227/04; F23N2227/06; F23N2227/28; F23N2233/00; F23N2233/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |