Patent US2803538A successfully refreshed from Google Patents.
US2803538A
Expired / Lapsed
US
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Self-hardening alloys
Assignee: Coast Metals Inc
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Filing: 1954-11-04
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Granted: 1957-08-20
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Expires: 1974-11-04
Abstract
No abstract record available.
Inventors
- 👤 Enrico M Zampieri
- 👤 Arthur T Cape
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A SELF-HARDENING ALLOY CONSISTING OF FROM ABOUT 1% TO ABOUT 4.25% CARBON, FROM ABOUT 1% TO ABOUT 4% SILICON, FROM ABOUT 4% TO ABOUT 8% MANGANESE, AND FROM ABOUT 10% TO ABOUT 30% CHROMIUM, THE REMAINDER BEING SUBSTANTIALLY IRON, AND THE SILICON AND MANGANESE BEING MAINTAINED AT ALL TIMES IN SUCH PROPORTIONAL RELATIONSHIP THAT THE ALLOY IS NON-MAGNETIC, SAID ALLOY HAVING A ROCKWELL C HARDNESS, IN THE AS-WELDED CONDITION, OF 30 TO 45.
Claim 2
Dependent Claim
73 words
A SELF-HARDENING ALLOY CONSISTING OF FROM ABOUT 1% TO ABOUT 4.25% CARBON, FROM ABOUT 1% TO ABOUT 4% SILICON, FROM ABOUT 4% TO ABOUT 8% MANGANESE, AND FROM ABOUT 10% TO ABOUT 30% CHROMIUM, THE REMAINDER BEING SUBSTANTIALLY IRON, AND THE SILICON AND MANGANESE BEING MAINTAINED AT ALL TIMES IN SUCH PROPORTIONAL RELATIONSHIP THAT THE ALLOY IS NON-MAGNETIC, SAID ALLOY HAVING A ROCKWELL C HARDNESS, IN THE AS-WELDED CONDITION, OF 30 TO 45.
References Cited (Backward Citations)
US1671384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |