US3199381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twist drill
Assignee: Individual
•
Filing: 1963-03-04
•
Granted: 1965-08-10
•
Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Bruce A Mackey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:11
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/02; B23B2240/00; B23B2240/08; B23B2251/00; B23B2251/48; B23B2251/50; Y; Y10; Y10T; Y10T408/00; Y10T408/78; Y10T408/89; Y10T408/907; Y10T408/909; Y10T408/9095; Y10T408/9097
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A DRILL COMPRISING: AN ELONGATE SHANK HAVING A LONGITUDINAL AXIS; A CUTTING TIP AFFIXED TO THE FORWARD END OF SAID SHANK; SAID CUTTING TIP HAVING GENERALLY PARALLEL FRONT AND REAR FACES WITH SIDE FACES DISPOSED TRANSVERSELY WITH RESPECT TO SAID FRONT AND REAR FACES, SAID SIDE FACES TAPERING GENERALLY UNIFORMLY REARWARDLY AT AN ACUTE ANGLE WITH RESPECT TO THE AXIS OF SAIAD SHANK TO DEFINE A CUTTING TIP BASE OF REDUCED WIDTH AT THE REARWARD END OF SAID CUTTING TIP; AND CUTTING TIP INCLUDING CUTTING FACES AT THE FORWARD END THEREOF, EACH OF SAID CUTTING FACES TAPERING FORWARDLY FROM THE FORWARDMOST END OF ONE OF SAID SIDE FACES, AND CONVERGING TOWARD ONE ANOTHER TO DEFINE A LEADING CUTTING TIP POINT; ONE OF SAID CUTTING FACES BEING DISPOSED AT AN ACUTE ANGLE WITH RESPECT TO SAID CUTTING TIP FRONT FACE TO DEFINE A CUTTING EDGE AT THE FORWARDMOST PORTION OF THE CUTTING TIP FRONT FACE, AND THE OTHER CUTTING
Claim 2
Dependent Claim
158 words
A DRILL COMPRISING: AN ELONGATE SHANK HAVING A LONGITUDINAL AXIS; A CUTTING TIP AFFIXED TO THE FORWARD END OF SAID SHANK; SAID CUTTING TIP HAVING GENERALLY PARALLEL FRONT AND REAR FACES WITH SIDE FACES DISPOSED TRANSVERSELY WITH RESPECT TO SAID FRONT AND REAR FACES, SAID SIDE FACES TAPERING GENERALLY UNIFORMLY REARWARDLY AT AN ACUTE ANGLE WITH RESPECT TO THE AXIS OF SAIAD SHANK TO DEFINE A CUTTING TIP BASE OF REDUCED WIDTH AT THE REARWARD END OF SAID CUTTING TIP; AND CUTTING TIP INCLUDING CUTTING FACES AT THE FORWARD END THEREOF, EACH OF SAID CUTTING FACES TAPERING FORWARDLY FROM THE FORWARDMOST END OF ONE OF SAID SIDE FACES, AND CONVERGING TOWARD ONE ANOTHER TO DEFINE A LEADING CUTTING TIP POINT; ONE OF SAID CUTTING FACES BEING DISPOSED AT AN ACUTE ANGLE WITH RESPECT TO SAID CUTTING TIP FRONT FACE TO DEFINE A CUTTING EDGE AT THE FORWARDMOST PORTION OF THE CUTTING TIP FRONT FACE, AND THE OTHER CUTTING
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |