Patent US4345942A successfully refreshed from Google Patents.
US4345942A
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Abrasion resistant sintered alloy for internal combustion engines
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1980-04-24
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Granted: 1982-08-24
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Expires: 2000-04-24
Abstract
Abstract An abrasion resistered sintered alloy for use in internal combustion engines which comprises 0.5 to 4.0% by weight of carbon, 1.5 to 16.0% by weight of Nb, 0.1 to 4.0% by weight of Mo, 0.1 to 1.0% by weight of Ni and 0.1 to 5.0% by weight of P which permits liquid-phase sintering at temperatures not higher than 1,250° C., and have 0.2 to 10% by volume of sintering pores at least 40% of which consist of pores having a pore size of not larger than 150 μm is disclosed.
Inventors
- 👤 Kentaro Takahashi
- 👤 Yoshikatsu Nakamura
- 👤 Masajiro Takeshita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:10
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
An abrasion resistant sintered alloy for use in internal combustion engines which comprises 0.5 to 4.0% by weight of carbon, 1.5 to 16.0% by weight of Nb, 0.1 to 4.0% by weight of Mo, 0.1 to 10.0% by weight of Ni and 0.1 to 5.0% by weight P which permits liquid-phase sintering at temperatures not higher than 1,250° C., and the balance Fe and have 0.2 to 10% by volume of sintering pores at least 40% of which consist of pores having a pore size of not larger than 150 μm.
Claim 2
Dependent Claim
91 words
An abrasion resistant sintered alloy for use in internal combustion engines which comprises 0.5 to 4.0% by weight of carbon, 1.5 to 16.0% by weight of Nb, 0.1 to 4.0% by weight of Mo, 0.1 to 10.0% by weight of Ni and 0.1 to 5.0% by weight P which permits liquid-phase sintering at temperatures not higher than 1,250° C., and the balance Fe and have 0.2 to 10% by volume of sintering pores at least 40% of which consist of pores having a pore size of not larger than 150 μm.
Claim 3
Dependent Claim
42 words
The abrasion resistant sintered alloy according to claim 1, wherein said alloy comprises 3.0 to 12.0% by weight of Nb, 0.4 to 3.0% by weight of Mo, 0.1 to 5.0% by weight of Ni, and 0.1 to 50% by weight of P.
Claim 4
Dependent Claim
63 words
The abrasion resistant sintered alloy according to claim 1, wherein said alloy comprises 1.5 to 12.0% by weight of Nb, 0.1 to 3.0% by weight of W, 0.1 to 3.0% by weight of Mo, 0.1 to 5.0% by weight of Ni, less than 1.5% by weight of Si, less than 1.0% by weight of Mn and 0.2 to 3.0% by weight of P.
Claim 5
Dependent Claim
33 words
The abrasion resistant sintered alloy according to claim 3, wherein said alloy further comprises 0.1 to 10.0% by weight of Ti and/or V and 0.1 to 5.0% by weight of Cu and/or Co.
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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) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |