Patent US3220148A successfully refreshed from Google Patents.
US3220148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive cutting devices and method of making the same
Assignee: Norton Christensen Inc
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Filing: 1963-07-29
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Granted: 1965-11-30
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Frank L Christensen
- 👤 Frear Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:09
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/121; B28D1/122; B24; B24D; B24D18/00; B24D5/00; B24D5/12; B24D5/123
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
IN AN ABRASIVE CUTTING APPARATUS: A ONE-PIECE ROTATAABLE DISC HAVING A CIRCUMFERENTIALLY CONTINUOUS GROOVE EXTENDING INWARDLY FROM ITS PERIPHERY; SAID DISC HAVING A CENTRAL HOLE AND BEING IMPERFORATE BETWEEN SAID HOLE AND GROOVE; A CIRCUMFERENTIALLY CONTINUOUS ANNULAR ABRASIVE CUTTING DEVICE INCLUDING A SEPARATE AND DISTINCT METALLIC ANNULAR ABRASIVE CUTTING RIM PORTION OVERLYING THE PERIPHERY OF SAID DISC AND SAID RIM PORTION AND AN INNER RIB DISPOSED IN SAID GROOVE AND SECURED TO SAID DISC.
Claim 2
Dependent Claim
74 words
IN AN ABRASIVE CUTTING APPARATUS: A ONE-PIECE ROTATAABLE DISC HAVING A CIRCUMFERENTIALLY CONTINUOUS GROOVE EXTENDING INWARDLY FROM ITS PERIPHERY; SAID DISC HAVING A CENTRAL HOLE AND BEING IMPERFORATE BETWEEN SAID HOLE AND GROOVE; A CIRCUMFERENTIALLY CONTINUOUS ANNULAR ABRASIVE CUTTING DEVICE INCLUDING A SEPARATE AND DISTINCT METALLIC ANNULAR ABRASIVE CUTTING RIM PORTION OVERLYING THE PERIPHERY OF SAID DISC AND SAID RIM PORTION AND AN INNER RIB DISPOSED IN SAID GROOVE AND SECURED TO SAID DISC.
Claim 3
Independent Claim
128 words
A METHOD OF MAKING AN ABRASIVE CUTTING APPARATUS, COMPRISING PROVIDING A DISC HAVING A GENERALLY RADIAL SLOT EXTENDING INWARDLY FROM ITS PERIPHERY AND A CIRCUMFERENTIALLY CONTINUOUS GROOVE EXTENDING INWARDLY FROM ITS PERIPHERY AND TERMINATING AT SAID SLOT, PROVIDING A SPLIT, CIRCUMFERENTIALLY CONTINUOUS ANNULAR ABRASIVE CUTTING DEVICE INCLUDING AN OUTER ABRASIVE CUTTING RIM PORTION AND AN INNER RIB, DEFLECTING SAID DISC AT SAID SLOT LATERALLY TO EXPOSED AN END OF SAID GROVE, FEEDING SAID RIB INTO SAID EXPOSED END OF SAID GROOVE AND CIRCUMFERENTIALLY IN SAID GROOVE TO PLACE THE FULL CIRCUMFERENCE OF SAID RIB IN SAID GROOVE AND SAID RIM PORTION IN OVERLYING RELATION TO THE PERIPHERY OF SAID DISC, DEFLECTING SAID DISC AT SAID SLOT BACK TO ITS INITIAL POSITION, AND SECURING SAID RIB TO SAID DISC.
Claim 4
Independent Claim
128 words
A METHOD OF MAKING AN ABRASIVE CUTTING APPARATUS, COMPRISING PROVIDING A DISC HAVING A GENERALLY RADIAL SLOT EXTENDING INWARDLY FROM ITS PERIPHERY AND A CIRCUMFERENTIALLY CONTINUOUS GROOVE EXTENDING INWARDLY FROM ITS PERIPHERY AND TERMINATING AT SAID SLOT, PROVIDING A SPLIT, CIRCUMFERENTIALLY CONTINUOUS ANNULAR ABRASIVE CUTTING DEVICE INCLUDING AN OUTER ABRASIVE CUTTING RIM PORTION AND AN INNER RIB, DEFLECTING SAID DISC AT SAID SLOT LATERALLY TO EXPOSED AN END OF SAID GROVE, FEEDING SAID RIB INTO SAID EXPOSED END OF SAID GROOVE AND CIRCUMFERENTIALLY IN SAID GROOVE TO PLACE THE FULL CIRCUMFERENCE OF SAID RIB IN SAID GROOVE AND SAID RIM PORTION IN OVERLYING RELATION TO THE PERIPHERY OF SAID DISC, DEFLECTING SAID DISC AT SAID SLOT BACK TO ITS INITIAL POSITION, AND SECURING SAID RIB TO SAID DISC.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |