Patent US3157938A successfully refreshed from Google Patents.
US3157938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical milling cutters
Assignee: National Research Development Corp UK
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Filing: 1962-09-18
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Granted: 1964-11-24
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Expires: 1982-09-18
Abstract
No abstract record available.
Inventors
- 👤 Sabberwal Amar Jit Parkash
- 👤 Hatton John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:16
CPC Classifications
B; B23; B23C; B23C5/00; B23C5/003; B23C5/02; B23C5/04; B23C2210/00; B23C2210/04; B23C2210/0485; B23C2210/0492; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1952; Y10T407/1962; Y10T407/1964; Y10T407/1966; Y10T407/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A CYLINDRICAL MILLING CUTTER COMPRISING A CENTRAL BODY PORTION AND AT LEAST ONE CUTTING TOOTH SUPPORTED ON SAID CENTRAL BODY PORTION, SAID CUTTING TOOTH BEING PROVIDED WITH A CUTTING EDGE WHICH EXTENDS HELICALLY ABOUT THE OUTER PERIPHERY OF SAID CENTRAL BODY PORTION, THE HELIX ANGLE OF SAID CUTTING EDGE DECREASING CONTINUOUSLY FROM ITS LEADING END TO ITS TRAILING END.
Claim 2
Dependent Claim
59 words
A CYLINDRICAL MILLING CUTTER COMPRISING A CENTRAL BODY PORTION AND AT LEAST ONE CUTTING TOOTH SUPPORTED ON SAID CENTRAL BODY PORTION, SAID CUTTING TOOTH BEING PROVIDED WITH A CUTTING EDGE WHICH EXTENDS HELICALLY ABOUT THE OUTER PERIPHERY OF SAID CENTRAL BODY PORTION, THE HELIX ANGLE OF SAID CUTTING EDGE DECREASING CONTINUOUSLY FROM ITS LEADING END TO ITS TRAILING END.
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |