Patent JPS6378779A successfully refreshed from Google Patents.
US3218892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal working process
Assignee: COLUMBUS MILPAR AND Manufacturing COMPAN
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Filing: 1962-04-30
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Granted: 1965-11-23
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Eugene C Fresch
- 👤 Nakrin Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:08
CPC Classifications
B; B21; B21K; B21K11/00; B21K11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF A CUTTING BLADE FROM A STEEL BLANK HAVING A CARBON CONTENT IN THE RANGE OF 0.30 TO 1.03% COMPRISING ANNEALING SAID BLANK TO A SPHEROIDIZED STATE, LUBRICATING SAID BLANK FOR COLD WORKING THEREOF, PERMITTING A FREE METAL FLOW UNDER CONTINUOUSLY APPLIED SHAPING PRESSURE OF THE ORDER OF 100 TONS PER SQUARE INCH TO SAID BLANK TO REORIENT THE SPHERODIZED GRANULAR STRUCTURE INTO ELONGATED GRAINS HAVING THEIR MAJOR AXES IN THE DIRECTION OF THE UTILITY OF SAID CUTTING BLADE.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF A CUTTING BLADE FROM A STEEL BLANK HAVING A CARBON CONTENT IN THE RANGE OF 0.30 TO 1.03% COMPRISING ANNEALING SAID BLANK TO A SPHEROIDIZED STATE, LUBRICATING SAID BLANK FOR COLD WORKING THEREOF, PERMITTING A FREE METAL FLOW UNDER CONTINUOUSLY APPLIED SHAPING PRESSURE OF THE ORDER OF 100 TONS PER SQUARE INCH TO SAID BLANK TO REORIENT THE SPHERODIZED GRANULAR STRUCTURE INTO ELONGATED GRAINS HAVING THEIR MAJOR AXES IN THE DIRECTION OF THE UTILITY OF SAID CUTTING BLADE.
References Cited (Backward Citations)
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Cited
US1578791A
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US2061780A
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US1543880A
Cited
US2486282A
Cited
US2987429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |