US3746519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength metal bonded tungsten carbide base composites
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1971-02-18
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Granted: 1973-07-17
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Expires: 1991-02-18
Abstract
Abstract A HIGH STRENGTH AND TOUGH SINTERED TUNGSTEN CARBIDE BASE COMPOSITE CONSISTING ESSENTIALLY OF METAL CARBIDES, CONTAINING TUNGSTEN CARBIDE AS A PRINCIPAL COMPONENT, AND FROM 10 TO 50 WEIGHT PERCENT OF A STEEL BINDER CONSISTING ESSENTIALLY OF 4 TO 30 WEIGHT PERCENT NICKEL AND/OR 1 TO 25 WEIGHT PERCENT COBALT, 1 TO 15 WEIGHT PERCENT MOLYBDENUM AND/OR 1 TO 10 WEIGHT PERCENT CHROMIUM.
Inventors
- 👤 A Hara
- 👤 S Yazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:49
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/067
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |