US2518433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring shearing machine
Assignee: National Machinery Co
•
Filing: 1946-03-20
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Granted: 1950-08-08
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Expires: 1966-03-20
Abstract
No abstract record available.
Inventors
- 👤 John H Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:52
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/16; B23; B23D; B23D21/00; B23D21/14; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2122; Y10T83/22; Y10T83/2205; Y10T83/384; Y10T83/395; Y10T83/396; Y10T83/404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |