US3260139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-clearing drill
Assignee: Individual
•
Filing: 1963-08-07
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Granted: 1966-07-12
•
Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Sanborn Frank Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/06; B23B51/063; B23B51/066; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/899
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A DEEP HOLE DRILL BIT HAVING A CUTTING END, A SHANK END AND A PART INTERMEDIATE SAID ENDS, AND A BIT COMPRISING A ROUND ROD, PORTIONS OF WHICH ARE REMOVED TO FORM WITH THE HOLE DRILLED BY THE BIT, A CHAMBER OF PROGRESSIVELY LARGER VOLUME FROM THE CUTTING END THEREOF TOWARD THE SHANK END, WHEREBY TO PROMOTE PASSAGE OF CLIPS FROM SAID CUTTING END TO THE EXTERIOR OF THE HOLE, SAID REMOVED PORTIONS COMPRISING A FLUTE EXTENDING FROM THE CUTTING END TO THE INTERMEDIATE PORTION AND DEFINED BY INTERSECTING CONTINUOUS FLAT WALLS, THE LINE OF INTERSECTION BEING DISPOSED AT AN ACUTE ANGLE WITH THE AXIS OF THE BIT.
Claim 2
Dependent Claim
108 words
A DEEP HOLE DRILL BIT HAVING A CUTTING END, A SHANK END AND A PART INTERMEDIATE SAID ENDS, AND A BIT COMPRISING A ROUND ROD, PORTIONS OF WHICH ARE REMOVED TO FORM WITH THE HOLE DRILLED BY THE BIT, A CHAMBER OF PROGRESSIVELY LARGER VOLUME FROM THE CUTTING END THEREOF TOWARD THE SHANK END, WHEREBY TO PROMOTE PASSAGE OF CLIPS FROM SAID CUTTING END TO THE EXTERIOR OF THE HOLE, SAID REMOVED PORTIONS COMPRISING A FLUTE EXTENDING FROM THE CUTTING END TO THE INTERMEDIATE PORTION AND DEFINED BY INTERSECTING CONTINUOUS FLAT WALLS, THE LINE OF INTERSECTION BEING DISPOSED AT AN ACUTE ANGLE WITH THE AXIS OF THE BIT.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |