Patent US3737290A successfully refreshed from Google Patents.
US3737290A
Expired / Lapsed
US
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Sintered titanium alloy
Assignee: Deutsche Edelstahlwerke AG
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Filing: 1971-08-27
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Granted: 1973-06-05
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Expires: 1991-08-27
Abstract
Abstract THE HARDNESS OF SINTERED TITANIUM AND SINTERED TITANIUM ALLOYS IS INCREASED WITHOUT AFFECTING SIGNIFICANTLY THE DENSITY THEREOF BY USING AS THE SINTER POWDER A MIXTURE OF FROM 40% TO 90% BY WEIGHT OF POWDERED TITANIUM OR TITANIUM ALLOY AND FROM 10% TO 60% BY WEIGHT OF A POWDERED HARD SUBSTANCE CONSISTING OF ONE OR MORE OF THE CARBIDES OF THE METALS TITANIUM, CHROMIUM OR VANADIUM.
Inventors
- 👤 F Frehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:31
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/067; C22C32/00; C22C32/0047; C22C32/0052
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |