US2170255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing of material
Assignee: Siemens Industry Inc
•
Filing: 1937-05-25
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Granted: 1939-08-22
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Expires: 1957-05-25
Abstract
No abstract record available.
Inventors
- 👤 John W Sheperdson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:29
CPC Classifications
B; B23; B23D; B23D25/00; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2022; Y10T83/2074; Y10T83/465; Y10T83/4749; Y10T83/4751; Y10T83/525; Y10T83/527; Y10T83/528; Y10T83/541; Y10T83/626; Y10T83/768; Y10T83/7755; Y10T83/7788
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) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |