Patent US3705025A successfully refreshed from Google Patents.
US3705025A
Expired / Lapsed
US
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Cutting tool
Assignee: EIDP Inc
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Filing: 1970-01-19
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Granted: 1972-12-05
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Expires: 1990-01-19
Abstract
Abstract A CUTTING TOOL HAVING A CUTTING EDGE COMPRISING DENSE HOMOGENEOUS COMPOSITIONS HAVING AN AVERAGE GRAIN SIZE LESS THAN ABOUT 10 MICRONS IS DISCLOSED. THE COMPOSITIONS COMPRISE: (1) 30-87% BY VOL. OF ALUMINA, ALUMINUM NITRIDE, ZIRCONIA, OR MIXTURES THEREOF; (2) 10-60% BY VOL. OF A NITRIDE OF TITANIUM, TANTALUM, ZIRCONIUM, HAFNIUM, NIOBIUM, OR MIXTURES THEREOF; AND (3) 3-15% BY VOL. OF A METAL COMPONENT HAVING: (A) 50%-80% BY VOL. OF TUNGSTEN, MOLYBDENUM, OR MIXTURES THEREOF; AND (B) 20-50% BY VOL. OF NICKEL, IRON, COBALT, OR MIXTURES THEREOF.
Inventors
- 👤 Alma U Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:13
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/12; C01; C01B; C01B21/00; C01B21/06; C01B21/072; C01B21/0726; C01B21/076; C04; C04B; C04B35/00; C04B35/71; H; H01; H01B; H01B1/00; C01P; C01P2004/00; C01P2004/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |