US1562087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for controlling combustion
Assignee: Henry L Doherty & Co
•
Filing: 1920-02-12
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Granted: 1925-11-17
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Expires: 1940-02-12
Abstract
No abstract record available.
Inventors
- 👤 Griswold John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:33
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/02
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) | 1928-11-16 | 1929-05-18 | 1929-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-11-16 | 1933-05-18 | 1933-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-11-16 | 1937-05-18 | 1937-11-17 | $7700.00 | Window Closed / Lapsed |