US2163241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for utilization of low grade fuel in internal combustion engines
Assignee: CHARLES A PIPENHAGEN
•
Filing: 1936-07-24
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Granted: 1939-06-20
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Expires: 1956-07-24
Abstract
No abstract record available.
Inventors
- 👤 Horace H Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4314; F02M2700/4319; Y; Y10; Y10S; Y10S236/00; Y10S236/06
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) | 1942-06-19 | 1942-12-19 | 1943-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-19 | 1946-12-19 | 1947-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-19 | 1950-12-19 | 1951-06-20 | $7700.00 | Window Closed / Lapsed |