Patent US2161268A successfully refreshed from Google Patents.
US2161268A
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Conoidal bit cutting machine
Assignee: Gould & Eberhardt
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Filing: 1937-08-14
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Granted: 1939-06-06
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Expires: 1957-08-14
Abstract
No abstract record available.
Inventors
- 👤 William F Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:11
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/12; B23F23/1293; B23F1/00; B23F1/06; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/107791; Y10T409/108745; Y10T409/108904; Y10T409/30; Y10T409/306664; Y10T409/307224; Y10T409/307448; Y10T409/307504
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) | 1942-06-05 | 1942-12-05 | 1943-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-05 | 1946-12-05 | 1947-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-05 | 1950-12-05 | 1951-06-06 | $7700.00 | Window Closed / Lapsed |