US4976778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infiltrated powder metal part and method for making same
Assignee: SCM Metal Products Inc
•
Filing: 1988-06-23
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Granted: 1990-12-11
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Expires: 2008-06-23
Abstract
Abstract The present invention relates to an infiltrated ferrous powder metal part containing certain additives, yielding a part having improved dimensional control during infiltration and uniform and predictable distribution of dynamic properties within a given group of commonly manufactured parts.
Inventors
- 👤 David F. Berry
- 👤 Erhard Klar
- 👤 Mark Svilar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:17
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0242; B; B22; B22F; B22F2998/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A process not necessitating solvent extraction of binder for making an infiltrated ferrous powder metal part which comprises the steps of: (a) mixing a metal powder with a binder to produce a binder-powder mix; (b) pressing said binder-powder mix into a compact; (c) sintering said compact; and (d) infiltrating said sintered compact.
Claim 2
Dependent Claim
52 words
A process not necessitating solvent extraction of binder for making an infiltrated ferrous powder metal part which comprises the steps of: (a) mixing a metal powder with a binder to produce a binder-powder mix; (b) pressing said binder-powder mix into a compact; (c) sintering said compact; and (d) infiltrating said sintered compact.
Claim 3
Dependent Claim
13 words
A process of claim 1, wherein the binder is a polyvinyl alcohol binder.
Claim 4
Dependent Claim
11 words
A process of claim 1, wherein the metal powder contains boron.
Claim 5
Dependent Claim
28 words
A binder-powder mix useful for producing an infiltrated ferrous powder metal part not necessitating solvent extraction of binder, said mix comprising a ferrous metal powder and a binder.
Claim 6
Dependent Claim
28 words
A binder-powder mix useful for producing an infiltrated ferrous powder metal part not necessitating solvent extraction of binder, said mix comprising a ferrous metal powder and a binder.
Claim 7
Dependent Claim
14 words
A powder mix of claim 4, wherein the binder is a polyvinyl alcohol binder.
Claim 8
Dependent Claim
13 words
A powder mix of claim 4, wherein the ferrous metal powder contains boron.
References Cited (Backward Citations)
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US4597938A
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US4606768A
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US4861373A
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US4710223A
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US4908164A
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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) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |