US2673554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating spark ignition engines
Assignee: DIESEL POWER Inc
•
Filing: 1950-02-13
•
Granted: 1954-03-30
•
Expires: 1970-02-13
Abstract
No abstract record available.
Inventors
- 👤 Fred A Thaheld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:24
CPC Classifications
F; F02; F02B; F02B21/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB180800A
Cited
GB341638A
Cited
US2076030A
Cited
US2000225A
Cited
GB362146A
Cited
US1998978A
Cited
US1954083A
Cited
US2036253A
Cited
US2098031A
Cited
US2457652A
Cited
US2534322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |