US2458086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine combustion regulating device
Assignee: Individual
•
Filing: 1946-05-09
•
Granted: 1949-01-04
•
Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Charles W Macmillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:24
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1981530A
Cited
US2064946A
Cited
US2220558A
Cited
US2225190A
Cited
US2298151A
Cited
US2394792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |