Patent US3142111A successfully refreshed from Google Patents.
US3142111A
Expired / Lapsed
US
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Rotary cutting tools
Assignee: Sheffield Twist Drill and Steel Co Ltd
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Filing: 1963-01-22
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Granted: 1964-07-28
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Expires: 1983-01-22
Abstract
No abstract record available.
Inventors
- 👤 Turner William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:49
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2265; B23C5/2269; B23C5/2273; Y; Y10; Y10T; Y10T407/00; Y10T407/11; Y10T407/116; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/192; Y10T407/1922; Y10T407/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A ROTARY CUTTING TOOL, A CIRCULAR BODY HAVING AT CIRCUMFERENTIALLY SPACED INTERVALS THEREIN CUTTER BIT-ACCOMMODATING SLOTS EXTENDING ACROSS AN OPERATIVE FACE OF THE BODY AND TAPERING IN WIDTH FROM ONE END TO THE OTHER; A SERIES OF SERRATIONS EXTENDING ACROSS A SIDE WALL OF EACH SLOT IN A DIRECTION PARALLEL TO SAID OPERATIVE FACE OF THE BODY; AN INSERT FIXEDLY SECURED IN AND CLOSING THE NARROW END OF EACH SLOT TO PROVIDE A CUTTER BIT LOCATING FACE THEREIN DISPOSED AT A PREDETERMINED ANGLE TO A BASAL WALL OF THE SLOT; A CUTTER BIT DISPOSED IN THE WIDE END OF EACH SLOT AND ABUTTING AGAINST A SIDE WALL OF SAID SLOT OPPOSITE
Claim 2
Dependent Claim
112 words
IN A ROTARY CUTTING TOOL, A CIRCULAR BODY HAVING AT CIRCUMFERENTIALLY SPACED INTERVALS THEREIN CUTTER BIT-ACCOMMODATING SLOTS EXTENDING ACROSS AN OPERATIVE FACE OF THE BODY AND TAPERING IN WIDTH FROM ONE END TO THE OTHER; A SERIES OF SERRATIONS EXTENDING ACROSS A SIDE WALL OF EACH SLOT IN A DIRECTION PARALLEL TO SAID OPERATIVE FACE OF THE BODY; AN INSERT FIXEDLY SECURED IN AND CLOSING THE NARROW END OF EACH SLOT TO PROVIDE A CUTTER BIT LOCATING FACE THEREIN DISPOSED AT A PREDETERMINED ANGLE TO A BASAL WALL OF THE SLOT; A CUTTER BIT DISPOSED IN THE WIDE END OF EACH SLOT AND ABUTTING AGAINST A SIDE WALL OF SAID SLOT OPPOSITE
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |