US3973951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High toughness and wear-resistance steel
Assignee: Komatsu Ltd
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Filing: 1975-02-11
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Granted: 1976-08-10
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Expires: 1995-02-11
Abstract
Abstract A high toughness and wear-resistance steel consisting, by weight percent based R weight of the steel, of 0.25 to 0.38 of carbon, 1.60 to 2.60 of silicon, 0-0.8 of manganese, 0-0.3 of phosphorus, 0-0.3 of sulphur, 3.0 to 6.0 of chromium and the balance of Fe. The steel is mainly used as an excavating tool edge material for construction machines.
Inventors
- 👤 Kazuyoshi Satsumabayashi
- 👤 Kiyoshi Mano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:27
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A high toughness and wear-resistance steel consisting of, by weight percent based on the weight of said steel, 0.25 to 0.38 of carbon, 1.60 to 2.60 of silicon 0 - 0.8 of manganese, 0 - 0.03 of phosphorus, 0 - 0.03 of sulphur, 3.0 to 6.0 of chromium and a balance of Fe.
Claim 2
Dependent Claim
53 words
A high toughness and wear-resistance steel consisting of, by weight percent based on the weight of said steel, 0.25 to 0.38 of carbon, 1.60 to 2.60 of silicon 0 - 0.8 of manganese, 0 - 0.03 of phosphorus, 0 - 0.03 of sulphur, 3.0 to 6.0 of chromium and a balance of Fe.
Claim 3
Dependent Claim
34 words
A high toughness and wear-resistance steel as set forth in claim 1, wherein said silicon content is preferably in the range of 1.73 to 2.41% by weight based on the weight of said steel.
Claim 4
Dependent Claim
34 words
A high toughness and wear-resistance steel as set forth in claim 1, wherein said chromium content is preferably in the range of 3.14 to 5.73% by weight based on the weight of said steel.
References Cited (Backward Citations)
US1915064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |