Patent US3690962A successfully refreshed from Google Patents.
US3690962A
Expired / Lapsed
US
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Carbide alloys suitable for cutting tools and wear parts
Assignee: Aerojet Rocketdyne Inc
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Filing: 1969-02-26
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Granted: 1972-09-12
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Expires: 1989-02-26
Abstract
Abstract THIS INVENTION RELATES TO REFACTORY METAL BONDED CARBIDE ALLOYS FOR USE AS CUTTING TOOLS AND IN OTHER APPLICATIONS WHERE HIGH HARDNESS AND ABRASION RESISTANCE ARE REQUIRED. THE DESIRED FINE-GRAIN, LAMELLAR MICROSTRUCTURE IS OBTAINED PREFERABLY BY CASTING EUTECTIC, OR NEAR-EUTECTIC ALLOYS OF A GROUP IVA METAL (TITANIUM, ZIRCONIUM, HAFNIUM), TUNGSTEN AND CARBON WHICH MAY CONTAIN CERTAIN ALLOYING AND INERT MATERIALS. FOR SELECTED APPLICATIONS, THE COMPOSITES MAY BE FABRICATED BY POWER-METALLURIGICAL TECHNIQUES.
Inventors
- 👤 Erwin Rudy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:41
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C30; C30B; C30B21/00; C30B21/02; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |