Patent US3552937A successfully refreshed from Google Patents.
US3552937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered alloys of a chromium carbide-tungsten carbide-nickel system
Assignee: Toshiba Corp
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Filing: 1969-02-06
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Granted: 1971-01-05
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Expires: 1989-02-06
Abstract
Abstract SINTERED ALLOYS MAINLY CONSISTING OF 25 TO 75 PERCENT BY WEIGHT OF CHROMIUM CARBIDE CR2C2, 10 TO 43 PERCENT BY WEIGHT OF TUNGSTEN CARBIDE WC AND 15 TO 50 PERCENT BY WEIGHT OF NICKEL NI AND CONTAINING ONE PERCENT MAX. BY WEIGHT OF IMPURITES. THESE ALLOYS ARE FULLY RESISTANT TO CHEMICAL CORROSION AND CAVITATION EROSION.
Inventors
- 👤 Satoru Mito
- 👤 Kazuo Suzuki
- 👤 Hiroshi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:10
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |