Patent US4561893A successfully refreshed from Google Patents.
US4561893A
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US
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Alloy steel powder for high strength sintered parts
Assignee: JFE Steel Corp
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Filing: 1984-09-25
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Granted: 1985-12-31
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Expires: 2004-09-25
Abstract
Abstract An alloy steel powder for high strength sintered parts consisting essentially of 0.4-1.3% by weight of Ni, 0.2-0.5% by weight of Cu, the total amount of Ni and Cu being 0.6-1.5% by weight, 0.1-0.3% by weight of Mo and the remainder being not more than 0.02% by weight of C, not more than 0.1% by weight of Si, not more than 0.3% by weight of Mn and not more than 0.01% by weight of N respectively in the incidental mixed amount and substantially Fe. The alloy steel powder may be a mixture of the alloy steel powder with ferro-phosphorus powder in an amount of phosphorus in the total fixed powder of 0.05-0.6% by weight.
Inventors
- 👤 Shigeaki Takajo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:39
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0264
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
An alloy steel powder for high strength sintered parts consisting essentially of 0.4-1.3% by weight of Ni, 0.2-0.5% by weight of Cu, the total amount of Ni and Cu being 0.6-1.5% by weight, 0.1-0.3% by weight of Mo and the remainder being not more than 0.02% by weight of C, not more than 0.1% by weight of Si, less than 0.3% by weight of Mn and not more than 0.01% by weight of N respectively in the incidental mixed amount and substantially Fe.
Claim 2
Dependent Claim
83 words
An alloy steel powder for high strength sintered parts consisting essentially of 0.4-1.3% by weight of Ni, 0.2-0.5% by weight of Cu, the total amount of Ni and Cu being 0.6-1.5% by weight, 0.1-0.3% by weight of Mo and the remainder being not more than 0.02% by weight of C, not more than 0.1% by weight of Si, less than 0.3% by weight of Mn and not more than 0.01% by weight of N respectively in the incidental mixed amount and substantially Fe.
Claim 3
Dependent Claim
39 words
An alloy steel powder as claimed in claim 1, wherein the alloy steel powder is a mixture of the alloy steel powder with ferro-phosphorous powder in an amount of phosphorus in the total mixed powder of 0.05-0.6% by weight.
References Cited (Backward Citations)
US3901661A
Cited
US4049429A
Cited
US4126452A
Cited
US4069044A
Cited
DE2749215A1
Cited
GB2035376A
Cited
US4236945A
Cited
US4437891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |