US2542707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine operating on the two-stroke cycle with compression ignition
Assignee: Individual
•
Filing: 1949-02-28
•
Granted: 1951-02-20
•
Expires: 1969-02-28
Abstract
No abstract record available.
Inventors
- 👤 Harry R Ricardo
- 👤 Holt George Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:45
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/02; F02B33/06; F02B33/20; F01; F01L; F01L13/00; F01L2760/00; F01L2760/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US976274A
Cited
US1220530A
Cited
GB375116A
Cited
US2148854A
Cited
FR807477A
Cited
US2236950A
Cited
US2220661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |