Patent US2793686A successfully refreshed from Google Patents.
US2793686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axially adjustable fuel burner for furnaces
Assignee: Individual
•
Filing: 1952-03-18
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Granted: 1957-05-28
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Expires: 1972-03-18
Abstract
No abstract record available.
Inventors
- 👤 Rubye W Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:55
CPC Classifications
F; F23; F23D; F23D11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1136849A
Cited
FR469254A
Cited
US1870013A
Cited
GB323578A
Cited
US1950980A
Cited
GB363396A
Cited
US2055366A
Cited
US2181527A
Cited
US2275394A
Cited
US2335188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |