Patent US2569446A successfully refreshed from Google Patents.
US2569446A
Expired / Lapsed
US
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Apparatus for the combustion of fuel, including a tubular walled combustion chamber
Assignee: Individual
•
Filing: 1943-10-18
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Granted: 1951-10-02
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Expires: 1963-10-18
Abstract
No abstract record available.
Inventors
- 👤 Claude A Bonvillian
- 👤 Ralph C Brierly
- 👤 Letvin Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:16
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/08; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/06; F23R3/08; F23R3/42; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE127287C
Cited
US1372121A
Cited
US1531475A
Cited
US1483917A
Cited
US1817470A
Cited
US1828784A
Cited
GB376974A
Cited
GB368263A
Cited
US2268464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |