US2417487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam engine
Assignee: Individual
•
Filing: 1944-03-18
•
Granted: 1947-03-18
•
Expires: 1964-03-18
Abstract
No abstract record available.
Inventors
- 👤 Edwin S Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:01
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/04; F01L; F01L7/00; F01L7/06; F02; F02B; F02B75/00; F02B75/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1097150A
Cited
US1338185A
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US1300098A
Cited
US1345940A
Cited
US1382485A
Cited
US1377899A
Cited
US1570902A
Cited
US2205953A
Cited
US2282721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-17 | 1950-09-16 | 1951-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-17 | 1954-09-16 | 1955-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-17 | 1958-09-16 | 1959-03-18 | $7700.00 | Window Closed / Lapsed |