Patent US3320655A successfully refreshed from Google Patents.
US3320655A
Expired / Lapsed
US
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Rotary milling cutter and method of restoring the same
Assignee: Ingersoll Rand Co
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Filing: 1964-06-15
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Granted: 1967-05-23
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Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Sr Charles N Schweitzer
- 👤 Albert W Cronin
- 👤 Samuel B Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:11
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/16; B23C5/20; B23C5/22; B23C5/2265; B23F; B23F21/00; B23F21/12; B23F21/14; B23F21/143; B23F21/146; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1908; Y10T407/1912; Y10T407/1914; Y10T407/1934; Y10T407/1938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A ROTARY MILLING CUTTER COMPRISING (A) A BODY, (B) A PLURALITY OF SPACED, CIRCUMFERENTIALLY ARRANGED, CUTTING BLADE-RECEIVING SLOTS, (C) CUTTING BLADES OF SUCCESSIVELY LONGER LENGTH DISPOSED IN EACH OF SAID SLOTS WITH THE CUTTING EDGE OF EACH BLADE LYING ON THE SAME IMAGINARY CIRCLE FROM THE CENTER OF SAID BODY, AND (D) AN ANNULAR RING SECURED TO SAID BODY FOR PARTIALLY CLOSING AN END OF SAID BLADE RECEIVING SLOTS, SAID
Claim 2
Dependent Claim
70 words
A ROTARY MILLING CUTTER COMPRISING (A) A BODY, (B) A PLURALITY OF SPACED, CIRCUMFERENTIALLY ARRANGED, CUTTING BLADE-RECEIVING SLOTS, (C) CUTTING BLADES OF SUCCESSIVELY LONGER LENGTH DISPOSED IN EACH OF SAID SLOTS WITH THE CUTTING EDGE OF EACH BLADE LYING ON THE SAME IMAGINARY CIRCLE FROM THE CENTER OF SAID BODY, AND (D) AN ANNULAR RING SECURED TO SAID BODY FOR PARTIALLY CLOSING AN END OF SAID BLADE RECEIVING SLOTS, SAID
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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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |