US1893875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety control mechanism for liquid fuel burners
Assignee: PREFERRED OIL BURNERS Inc
•
Filing: 1923-04-16
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Granted: 1933-01-10
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Expires: 1943-04-16
Abstract
No abstract record available.
Inventors
- 👤 Loyd I Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:55
CPC Classifications
F; F23; F23D; F23D5/00; F23D5/12; F23D5/16; F23N; F23N2239/00; F23N2239/06
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) | 1936-01-10 | 1936-07-11 | 1937-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-01-10 | 1940-07-11 | 1941-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-01-10 | 1944-07-11 | 1945-01-10 | $7700.00 | Window Closed / Lapsed |