US3106973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary drill bits
Assignee: Norton Christensen Inc
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Filing: 1960-09-26
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Granted: 1963-10-15
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Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Frank L Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:46
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/62; E21B10/627; E21B10/633; E21B10/42; E21B10/46; E21B10/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A CUTTER BLADE FOR ROTARY DRILL BIT ADAPTED TO BE DISPOSED IN A BORE HOLE, INCLUDING A BODY HAVING GENERALLY PARALLEL LONGITUDINAL GROOVES IN ITS LEADING FACE EXTENDING UPWARDLY FROM ITS LOWER END AND SPACED FROM EACH OTHER ACROSS SAID LEADING FACE; AND DIAMOND IMPREGNATED CUTTER SECTIONS IN SAID GROOVES SECURED TO SAID BODY AND EXTENDING UPWARDLY FROM THE LOWER END OF SAID BODY; THE WIDTH AND DEPTH OF EACH GROOVE AND CUTTER SECTION THEREIN PROGRESSIVELY INCREASING IN ONE DIRECTION ACROSS THE FACE OF SAID BODY.
Claim 2
Dependent Claim
86 words
A CUTTER BLADE FOR ROTARY DRILL BIT ADAPTED TO BE DISPOSED IN A BORE HOLE, INCLUDING A BODY HAVING GENERALLY PARALLEL LONGITUDINAL GROOVES IN ITS LEADING FACE EXTENDING UPWARDLY FROM ITS LOWER END AND SPACED FROM EACH OTHER ACROSS SAID LEADING FACE; AND DIAMOND IMPREGNATED CUTTER SECTIONS IN SAID GROOVES SECURED TO SAID BODY AND EXTENDING UPWARDLY FROM THE LOWER END OF SAID BODY; THE WIDTH AND DEPTH OF EACH GROOVE AND CUTTER SECTION THEREIN PROGRESSIVELY INCREASING IN ONE DIRECTION ACROSS THE FACE OF SAID BODY.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |