US3099324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulation ports for drill bit
Assignee: Reed Roller Bit Co
•
Filing: 1959-06-02
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Granted: 1963-07-30
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Expires: 1979-06-02
Abstract
No abstract record available.
Inventors
- 👤 Clement M Kucera
- 👤 Homme Daniel L Del
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:45
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A DRILL BIT HAVING A HEAD, SAID HEAD HAVING A PLURALITY OF DOWNWARDLY EXTENDING BEARING EXTENSIONS, A ROLLER CUTTER MOUNTED ON EACH OF THE SAID BEARING EXTENSIONS, AT LEAST ONE OF THE SAID BEARING EXTENSIONS HAVING A PASSAGEWAY THERETHROUGH ADJACENT THE UPPER OUTER PORTION OF THE ROLLER CUTTER MOUNTED THEREON, THE AXIS OF THE SAID PASSAGEWAY BEING DIRECTED TO THE FORWARD SIDE OF THE LONGITUDINAL AXIS OF THE DRILL BIT WITH RESPECT TO THE BIT ROTATION.
References Cited (Backward Citations)
US2692117A
Cited
US2776115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |