Patent US2870836A successfully refreshed from Google Patents.
US2870836A
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US
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Trepanned core cutoff tool
Assignee: Individual
•
Filing: 1955-05-19
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Granted: 1959-01-27
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Expires: 1975-05-19
Abstract
No abstract record available.
Inventors
- 👤 Nicola P Rosato
- 👤 Sven E Siemen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:39
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0413; Y; Y10; Y10T; Y10T82/00; Y10T82/16; Y10T82/16426; Y10T82/16639; Y10T82/25; Y10T82/2583
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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |