US1418307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon engine
Assignee: Individual
•
Filing: 1917-10-29
•
Granted: 1922-06-06
•
Expires: 1937-10-29
Abstract
No abstract record available.
Inventors
- 👤 Charles J Kierum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:35
CPC Classifications
F; F01; F01B; F01B7/00; F01B7/02; F01B7/04; F01B7/12; F02; F02B; F02B75/00; F02B75/28
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) | 1925-06-05 | 1925-12-05 | 1926-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-06-05 | 1929-12-05 | 1930-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-06-05 | 1933-12-05 | 1934-06-06 | $7700.00 | Window Closed / Lapsed |