US2491578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankpin hone
Assignee: Individual
•
Filing: 1947-11-24
•
Granted: 1949-12-20
•
Expires: 1967-11-24
Abstract
No abstract record available.
Inventors
- 👤 Paul G Pirwitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:44
CPC Classifications
B; B24; B24B; B24B33/00; B24B33/08; B24B33/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR742435A
Cited
US1221472A
Cited
US1370141A
Cited
US1622292A
Cited
US1928506A
Cited
US2245435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |