Patent US2575218A successfully refreshed from Google Patents.
US2575218A
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Ferrous alloys and abrasive-resistant articles made therefrom
Assignee: LATROBE ELECTRIC STEEL Co
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Filing: 1950-10-07
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Granted: 1951-11-13
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Expires: 1970-10-07
Abstract
No abstract record available.
Inventors
- 👤 David J Giles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:32
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/56; C22C38/02; C22C38/04; C22C38/22; C22C38/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
AN ABRASION - RESISTING ALLOY COMPRISING ABOUT 2.3% TO 2.6% OF CARBON, ABOUT 12.5% TO 13.75% OF CHROMIUM, ABOUT 3% TO 5% OF VANADIUM, ABOUT 0.2% TO 0.6% SILICON, ABOUT 0.25% TO 0.6% MANGANESE, AND THE BALANCE SUBSTANTIALLY IRON WITH RESIDUAL IMPURITIES IN ORDINARY AMOUNTS, IN WHICH ALLOY THE VANADIUM IN EXCESS OF ABOUT 1% IS COMBINED WITH CARBON IN RATIO OF ABOUT 4.2:1.
Claim 2
Dependent Claim
64 words
AN ABRASION - RESISTING ALLOY COMPRISING ABOUT 2.3% TO 2.6% OF CARBON, ABOUT 12.5% TO 13.75% OF CHROMIUM, ABOUT 3% TO 5% OF VANADIUM, ABOUT 0.2% TO 0.6% SILICON, ABOUT 0.25% TO 0.6% MANGANESE, AND THE BALANCE SUBSTANTIALLY IRON WITH RESIDUAL IMPURITIES IN ORDINARY AMOUNTS, IN WHICH ALLOY THE VANADIUM IN EXCESS OF ABOUT 1% IS COMBINED WITH CARBON IN RATIO OF ABOUT 4.2:1.
References Cited (Backward Citations)
DE693146C
Cited
US2355726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |