US3191698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade-type drill bit
Assignee: Drilling and Service Inc
•
Filing: 1962-05-17
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Granted: 1965-06-29
•
Expires: 1982-05-17
Abstract
No abstract record available.
Inventors
- 👤 Short Lot William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:41
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A DRILL BIT COMPRISING: A BIT BODY HAVING AT ITS UPPER END AN AXIAL RECESS AND AT ITS LOWER END A WORKING FACE, SAID WORKING FACE BEING FORMED WITH A PLURALITY OF WATER GROOVES EXTENDING FROM NEAR THE CENTER OF SAID FACE TO THE PERIPHERY THEREOF, THE WORKING FACE ALONG THE CORRESPONDING ONE SIDE OF EACH GROOVE FORMING WITH THE ADJACENT GROOVE WALL A BLADE-LIKE PROJECTING RIB, EACH OF SAID RIBS BEING SET WITH A SINGLE ROW OF CLOSELY SPACED DIAMONDS EXTENDING THEREALONG AND PRESENTING ABRASIVE CUTTING EDGES TO THE GROOVE SIDE THEREOF, THE WORKING FACE ALONG THE OTHER SIDE OF EACH GROOVE BEING GENERALLY FLAT AND OFFSET AXIALLY UPWARDLY OF
Claim 2
Dependent Claim
111 words
A DRILL BIT COMPRISING: A BIT BODY HAVING AT ITS UPPER END AN AXIAL RECESS AND AT ITS LOWER END A WORKING FACE, SAID WORKING FACE BEING FORMED WITH A PLURALITY OF WATER GROOVES EXTENDING FROM NEAR THE CENTER OF SAID FACE TO THE PERIPHERY THEREOF, THE WORKING FACE ALONG THE CORRESPONDING ONE SIDE OF EACH GROOVE FORMING WITH THE ADJACENT GROOVE WALL A BLADE-LIKE PROJECTING RIB, EACH OF SAID RIBS BEING SET WITH A SINGLE ROW OF CLOSELY SPACED DIAMONDS EXTENDING THEREALONG AND PRESENTING ABRASIVE CUTTING EDGES TO THE GROOVE SIDE THEREOF, THE WORKING FACE ALONG THE OTHER SIDE OF EACH GROOVE BEING GENERALLY FLAT AND OFFSET AXIALLY UPWARDLY OF
References Cited (Backward Citations)
US2371489A
Cited
US2371490A
Cited
US2990897A
Cited
US2931630A
Cited
US2998088A
Cited
FR1249346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |