Patent US3306669A successfully refreshed from Google Patents.
US3306669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond milling cutters
Assignee: Norton Christensen Inc
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Filing: 1964-02-17
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Granted: 1967-02-28
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Expires: 1984-02-17
Abstract
No abstract record available.
Inventors
- 👤 Frank L Christensen
- 👤 Donald H Mabey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:13
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/18; B28D1/186
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A MILLING CUTTER: A GENERALLY CYLINDRICAL UNITARY MATRIX BODY ADAPTED TO BE ROTATED ABOUT ITS AXIS AND HAVING AXIALLY SPACED CIRCUMFERENTIAL RIDGES OF MATRIX MATERIAL OF SUBSTANTIALLY THE SAME RADIUS EXTENDING AROUND ITS PERIPHERY IN PARALLEL RELATION TO EACH OTHER AND DISPOSED NORMAL TO THE BODY AXIS; AND INDIVIDUAL DIAMOND CUTTING ELEMENTS EMBEDDED IN EACH RIDGE AND SPACED CIRCUMFERENTIALLY FROM EACH OTHER AROUND EACH RIDGE.
Claim 2
Dependent Claim
66 words
IN A MILLING CUTTER: A GENERALLY CYLINDRICAL UNITARY MATRIX BODY ADAPTED TO BE ROTATED ABOUT ITS AXIS AND HAVING AXIALLY SPACED CIRCUMFERENTIAL RIDGES OF MATRIX MATERIAL OF SUBSTANTIALLY THE SAME RADIUS EXTENDING AROUND ITS PERIPHERY IN PARALLEL RELATION TO EACH OTHER AND DISPOSED NORMAL TO THE BODY AXIS; AND INDIVIDUAL DIAMOND CUTTING ELEMENTS EMBEDDED IN EACH RIDGE AND SPACED CIRCUMFERENTIALLY FROM EACH OTHER AROUND EACH RIDGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |