Patent US2317004A successfully refreshed from Google Patents.
US2317004A
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US
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Lubricating piston engine
Assignee: Individual
•
Filing: 1940-11-23
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Granted: 1943-04-20
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Expires: 1960-11-23
Abstract
No abstract record available.
Inventors
- 👤 Wallgren August Gunn Ferdinand
- 👤 Evrell Kaleb Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:05
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/08; F01; F01M; F01M1/00; F01M1/06; F02; F02F; F02F3/00; F02F3/0015; F02F3/0023; F16J1/10; F16J1/14; F16J1/22; F01M1/08; F01M2001/086; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0433; F05C2201/0448
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) | 1946-04-19 | 1946-10-19 | 1947-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-04-19 | 1950-10-19 | 1951-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-04-19 | 1954-10-19 | 1955-04-20 | $7700.00 | Window Closed / Lapsed |