US2469651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opposed piston engine construction with removable cylinders
Assignee: Baldwin Locomotive Works
•
Filing: 1945-11-15
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Granted: 1949-05-10
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Expires: 1965-11-15
Abstract
No abstract record available.
Inventors
- 👤 Carl A Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:01
CPC Classifications
F; F01; F01B; F01B7/00; F01B7/02; F01B7/14; F02; F02F; F02F7/00; F02F7/0043; F02F7/0046; F02B; F02B75/00; F02B75/28; Y; Y10; Y10S; Y10S123/00; Y10S123/06; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |