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US3619170A
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US
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Copper infiltrating composition for porous ferruginous parts
Assignee: SCM Metal Products Inc
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Filing: 1969-07-24
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Granted: 1971-11-09
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Expires: 1989-07-24
Abstract
Abstract Disclosed is an infiltrating composition for infiltrating iron compacts. The infiltrating composition is a conventional copperbased infiltrating powder containing a small amount of ironchromium alloy as a release agent to prevent adhesion of the infiltrating slug residue to the infiltrated iron compact.
Inventors
- 👤 Ernest L Fisher
- 👤 Glen D Kole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:04
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0242
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
The composition of claim 1 which further contains up to about 1 percent by weight of impalPable carbon.
Claim 2
Dependent Claim
42 words
The composition of claim 1 which consists essentially of an intimate physical blend of at least about 85 percent copper powder, 3-12 percent iron powder 0.1-2 percent impalpable refractory, 0-1 percent impalpable carbon and 0.1 to 3 percent of said iron-chromium alloy.
Claim 3
Dependent Claim
16 words
The composition of claim 3 wherein said particulate alloy has a particle size passing 80 mesh.
Claim 4
Dependent Claim
25 words
The composition of claim 3 which contains at least about 90 percent copper and about 5 to about 8 percent iron on a weight basis.
Claim 5
Dependent Claim
19 words
The composition of claim 5 which contains about 0.5 to about 2 percent by weight of said iron-chromium alloy.
Claim 6
Dependent Claim
33 words
The composition of claim 3 wherein said iron-chromium alloy has a composition within the weight percent range of about chromium 10-30 percent, nickel 0-20 percent, molybdenum 0-5 percent, carbon 0-0.2 percent, iron balance.
Claim 7
Dependent Claim
15 words
The composition of claim 7 wherein said alloy is a 300 series stainless steel alloy.
Claim 8
Dependent Claim
15 words
The composition of claim 7 wherein said alloy is a 400 series stainless steel alloy.
Claim 9
Dependent Claim
16 words
The composition of claim 3 wherein said alloy is 50 percent iron and 50 percent chromium.
References Cited (Backward Citations)
US3307924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |