US3907553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-carbon steel suitable for super high tensile strength hard drawn steel wire
Assignee: Nippon Steel Corp
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Filing: 1972-12-06
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Granted: 1975-09-23
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Expires: 1992-12-06
Abstract
Abstract A high-carbon steel suitable for super high tensile strength steel wire having excellent ductility and heat treating ability, comprising 0.75-1.0% of carbon, not more than 0.5% of silicon, 0.1 to 1.0% of manganese, 0.5 to 5.0% of chromium, one or more of 1 to 4% of cobalt, 0.01 to 0.2% of niobium, 0.001 to 0.05% of titanium, 0.01 to 0.3% of vanadium and not more than 0.1% of aluminum with the balance being iron and unavoidable impurities.
Inventors
- 👤 Michihiko Nagumo
- 👤 Shigehiro Yamaguchi
- 👤 Toshihiko Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:54
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A SUPER HIGH STRENGHT STEEL WIRE HAVING EXCELLENT HEAT TREATING ABILITY CONSISTING ESSENTIALLY OF 0.75 -1.0% OF CARBON NOT MORE THAN 0.5% OF SILICON, 0.1 TO 1.0% OF MANGANESE, 1.0 TO 5.0% OF CHROMIUM, AND A METAL SELECTED FROM THE GRUP CONSISTING OF 1 TO 4% OF COBALT, 0.01 TO 0.2% OF NIOBIUM, 0.001 TO 0.0 TITANIUM, 0.01 TO 0.3% OF VANADIUM AND NOT MORE THAN 0.1% OF ALUMINUM WITH THE BALANCE BEING IRON AND UNAVOIDABLE IMPURITIES.
Claim 2
Dependent Claim
77 words
A SUPER HIGH STRENGHT STEEL WIRE HAVING EXCELLENT HEAT TREATING ABILITY CONSISTING ESSENTIALLY OF 0.75 -1.0% OF CARBON NOT MORE THAN 0.5% OF SILICON, 0.1 TO 1.0% OF MANGANESE, 1.0 TO 5.0% OF CHROMIUM, AND A METAL SELECTED FROM THE GRUP CONSISTING OF 1 TO 4% OF COBALT, 0.01 TO 0.2% OF NIOBIUM, 0.001 TO 0.0 TITANIUM, 0.01 TO 0.3% OF VANADIUM AND NOT MORE THAN 0.1% OF ALUMINUM WITH THE BALANCE BEING IRON AND UNAVOIDABLE IMPURITIES.
References Cited (Backward Citations)
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US2983601A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |