US2553062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid fuel combustion apparatus and control therefor
Assignee: UnionTools Inc
•
Filing: 1945-10-05
•
Granted: 1951-05-15
•
Expires: 1965-10-05
Abstract
No abstract record available.
Inventors
- 👤 William L Riehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/46; Y; Y10; Y10T; Y10T137/00; Y10T137/1407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1975656A
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US1982561A
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US2017725A
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US2214558A
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US2200908A
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US2305242A
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US2305243A
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US2361530A
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US2373326A
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US2290963A
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US2407438A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |