US4707184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous metal parts and method for making the same
Assignee: SCM Metal Products Inc
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Filing: 1985-05-31
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Granted: 1987-11-17
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Expires: 2005-05-31
Abstract
Abstract A gas permeable or porous article of irregular configuration comprising a sintered structure of dispersion strengthened metal or metal alloy particles. The present invention also relates to a novel method for making such article.
Inventors
- 👤 Don H. Hashiguchi
- 👤 Erhard Klar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:43
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F5/00; B22F5/007; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0021; C23; C23C; C23C4/00; C23C4/18; B22F2998/00; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10S75/951; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A gas permeable or highly porous noncompacted article having a porosity of from 40% to 60% and a pore size less than 300 micrometers and being of irregular configuration comprising a sintered structure of dispersion strengthened metal or dispersion strengthened metal alloy particles.
Claim 2
Dependent Claim
43 words
A gas permeable or highly porous noncompacted article having a porosity of from 40% to 60% and a pore size less than 300 micrometers and being of irregular configuration comprising a sintered structure of dispersion strengthened metal or dispersion strengthened metal alloy particles.
Claim 3
Dependent Claim
16 words
The article of claim 1 wherein said particles are dispersion strengthened bronze or dispersion strengthened copper.
Claim 4
Dependent Claim
41 words
The article of claims 1 or 2 wherein said structure is a gas permeable foundry mold pattern, the pores of said pattern being interconnected, generally less than 300 micrometers in diameter, and more than 40 percent by volume of pattern volume.
Claim 5
Dependent Claim
50 words
The article of claims 1 or 2 prepared by the steps of flame spraying said particles onto a contour followed by sintering; preparing a blend of said particles with a no-slump paste vehicle and forming said paste into a desired shape; or loose-pack filling a mold space with said particles.
Claim 6
Dependent Claim
57 words
A gas permeable or highly porous article having a porosity of from 40% to 60% and a pore size of from 15 to 300 micrometers and being of irregular configuration comprising a non-compacted sintered structure made from a mixture of a metal or metal alloy powder and refractory oxide in effective amount to inhibit shrinkage during sintering.
Claim 7
Dependent Claim
57 words
A gas permeable or highly porous article having a porosity of from 40% to 60% and a pore size of from 15 to 300 micrometers and being of irregular configuration comprising a non-compacted sintered structure made from a mixture of a metal or metal alloy powder and refractory oxide in effective amount to inhibit shrinkage during sintering.
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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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |