US3555937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond drill
Assignee: Kennametal Inc
•
Filing: 1968-05-17
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Granted: 1971-01-19
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Expires: 1988-05-17
Abstract
Abstract DRILLING TOOL HAVING A HOLLOW CARBIDE SHANK WITH STEEL HEAD FIXED TO ONE END AND A DIAMOND CUTTING ELEMENT FIXED IN THE STEEL HEAD WITH A PASSAGE THROUGH THE STEEL HEAD SO SUCTION OR PRESSURE CAN BE APPLIED TO THE HOLLOW SANK TO REMOVE GROUND OFF MATERIAL FROM THE BORE BEING MADE BY THE TOOL.
Inventors
- 👤 William F Nicodemas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:49
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/0002; B23B51/0003; B23B2222/00; B23B2222/28; B23B2224/00; B23B2224/28; B23B2226/00; B23B2226/31; B23B2240/00; B23B2240/08; B23B2240/21; B23B2251/00; B23B2251/02; B23B2251/68; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/78; Y10T408/81
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |