Patent US4229300A successfully refreshed from Google Patents.
US1402243A
Expired / Lapsed
US
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Method of burning fuel and apparatus therefor
Assignee: Skinner Engine Co
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Filing: 1920-09-27
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Granted: 1922-01-03
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Expires: 1940-09-27
Abstract
No abstract record available.
Inventors
- 👤 Robert F Metcalfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:40
CPC Classifications
F; F23; F23C; F23C99/00; F23C2700/00; F23C2700/02; F23C2700/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-01-02 | 1925-07-04 | 1926-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-01-02 | 1929-07-04 | 1930-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-01-02 | 1933-07-04 | 1934-01-03 | $7700.00 | Window Closed / Lapsed |