US3135341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond drill bits
Assignee: Norton Christensen Inc
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Filing: 1960-10-04
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Granted: 1964-06-02
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Expires: 1980-10-04
Abstract
No abstract record available.
Inventors
- 👤 Marcel G Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:25
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/60; E21B10/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A ROTARY BIT: A BODY HAVING A CUTTING FACE FOR DRILLING A HOLE; SAID FACE COMPRISING A PLURALITY OF SPACED LANDS EXTENDING LATERALLY FROM AN INNER PORTION OF THE FACE TO THE OUTER PORTION OF THE FACE, SAID CUTTING FACE HAVING WATERWAYS SEPARATING SAID LANDS FROM EACH OTHER, EACH LAND HAVING CONCENTRIC ARCUATE RIDGES EXTENDING LATERALLY FROM THE INNER TO THE OUTER PORTIONS OF THE FACE AND HAVING THE BIT AXIS AS A CENTER, THE RIDGES OF ONE LAND BEING OFFSET RADIALLY WITH RESPECT TO THE RIDGES OF ANOTHER LAND, EACH RIDGE INCLUDING SIDES EXCLUSIVELY ITS OWN AND A CREST PORTION TOWARD WHICH SAID SIDES CONVERGE, THE CONFRONTING SIDES OF ADJACENT RIDGES OF EACH LAND FORMING AN ARCUATE RECESS THEREBETWEEN, AN ARCUATE ROW OF CUTTING ELEMENTS IN SAID CREST PORTION, AND AN ARCUATE ROW OF CUTTING ELEMENTS IN ONE OF SAID SIDES IN STAGGERED RELATION TO SAID OTHER ROW.
Claim 2
Dependent Claim
150 words
IN A ROTARY BIT: A BODY HAVING A CUTTING FACE FOR DRILLING A HOLE; SAID FACE COMPRISING A PLURALITY OF SPACED LANDS EXTENDING LATERALLY FROM AN INNER PORTION OF THE FACE TO THE OUTER PORTION OF THE FACE, SAID CUTTING FACE HAVING WATERWAYS SEPARATING SAID LANDS FROM EACH OTHER, EACH LAND HAVING CONCENTRIC ARCUATE RIDGES EXTENDING LATERALLY FROM THE INNER TO THE OUTER PORTIONS OF THE FACE AND HAVING THE BIT AXIS AS A CENTER, THE RIDGES OF ONE LAND BEING OFFSET RADIALLY WITH RESPECT TO THE RIDGES OF ANOTHER LAND, EACH RIDGE INCLUDING SIDES EXCLUSIVELY ITS OWN AND A CREST PORTION TOWARD WHICH SAID SIDES CONVERGE, THE CONFRONTING SIDES OF ADJACENT RIDGES OF EACH LAND FORMING AN ARCUATE RECESS THEREBETWEEN, AN ARCUATE ROW OF CUTTING ELEMENTS IN SAID CREST PORTION, AND AN ARCUATE ROW OF CUTTING ELEMENTS IN ONE OF SAID SIDES IN STAGGERED RELATION TO SAID OTHER ROW.
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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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |