US2204068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal-combustion engine of the fuel-injection compression-ignition type
Assignee: F Perkins Ltd
•
Filing: 1939-05-24
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Granted: 1940-06-11
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Expires: 1959-05-24
Abstract
No abstract record available.
Inventors
- 👤 Chapman Charles Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:10
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/02; F02B23/04; F02B19/00; F02B19/02; F02B19/08; F02B19/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1943-06-11 | 1943-12-11 | 1944-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-11 | 1947-12-11 | 1948-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-11 | 1951-12-11 | 1952-06-11 | $7700.00 | Window Closed / Lapsed |