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Patent US3719475A successfully refreshed from Google Patents.
US3719475A
Expired / Lapsed
US
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Low carbon ferrous alloy containing chromium
Assignee: Centre de Recherches Metallurgiques CRM ASBL
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Filing: 1970-02-13
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Granted: 1973-03-06
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Expires: 1990-02-13
Abstract
Abstract THE ALLOW CONTAINS CR, 13 TO 25%, TI 2 TO 7%, AND OPTIONALLY ONE OR MORE OF THE FOLLOWING METALS: AL 0 TO 6%, V 2 TO 7%, SI 2 TO 7%, MO 0 TO 3%, RARE EARTH METALS 0 TO 0.5% EACH. THE BALANCE IS FE WITH AT MOST 0.005% C. THE PROPERTIES OF THE ALLOY ARE IMPROVED BY SOLUTION HEAT-TREATMENT FOLLOWED BY HOT-WORKING.
Inventors
- 👤 L Habraken
- 👤 V Leroy
- 👤 M Meulemans
- 👤 F Carteels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:14
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/28
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |