US2575219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrous alloys and abrasive-resistant articles made therefrom
Assignee: LATROBE ELECTRIC STEEL Co
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Filing: 1951-01-10
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Granted: 1951-11-13
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Expires: 1971-01-10
Abstract
No abstract record available.
Inventors
- 👤 David J Giles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
AN ABRASION-RESISTING ALLOY COMPRISING ABOUT 1.65% TO 1.95% OF CARBON, ABOUT 4% TO 6% OF CHROMIUM, ABOUT 0.1% TO 0.7% OF SILICON, ABOUT 0.2% TO 0.9% OF MANGANESE, ABOUT 3% TO 5% OF VANADIUM, AND THE BALANCE SUBSTANTIALLY IRON WITH RESIDUAL IMPURITIES IN ORDINAKRY AMOUNTS, IN WHICH ALLOY THE VANADIUM IN EXCESS OF ABOUT 1% IS COMBINED WITH CARBON IN A RATIO OF ABOUT 4.2:1.
Claim 2
Dependent Claim
65 words
AN ABRASION-RESISTING ALLOY COMPRISING ABOUT 1.65% TO 1.95% OF CARBON, ABOUT 4% TO 6% OF CHROMIUM, ABOUT 0.1% TO 0.7% OF SILICON, ABOUT 0.2% TO 0.9% OF MANGANESE, ABOUT 3% TO 5% OF VANADIUM, AND THE BALANCE SUBSTANTIALLY IRON WITH RESIDUAL IMPURITIES IN ORDINAKRY AMOUNTS, IN WHICH ALLOY THE VANADIUM IN EXCESS OF ABOUT 1% IS COMBINED WITH CARBON IN A RATIO OF ABOUT 4.2:1.
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 |