Patent US4168162A successfully refreshed from Google Patents.
US4168162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infiltrating powder composition
Assignee: SCM Metal Products Inc
•
Filing: 1978-09-22
•
Granted: 1979-09-18
•
Expires: 1998-09-22
Abstract
Abstract An infiltrating powder composition for infiltrating porous iron compacts comprises a copper powder mixture containing a minor amount iron powder, copper-maganese alloy powder, stainless steel powder, refractory metal oxide, and aluminum powder.
Inventors
- 👤 William M. Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:43
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0242
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
An infiltrating composition comprising powder metal mixture on a weight percent basis: at least about 90% copper powder having a particle size less than about 177 microns; between about 2% and 8% iron powder having a particle size less than 20 microns; between about 1% and 5% copper-manganese alloy powder; between about 0.4% and 1% refractory metal oxide powder; between about 0.3% and 0.8% stainless steel powder having a particle size less than about 150 microns; and between about 0.05% and 0.2% aluminum powder.
Claim 2
Dependent Claim
84 words
An infiltrating composition comprising powder metal mixture on a weight percent basis: at least about 90% copper powder having a particle size less than about 177 microns; between about 2% and 8% iron powder having a particle size less than 20 microns; between about 1% and 5% copper-manganese alloy powder; between about 0.4% and 1% refractory metal oxide powder; between about 0.3% and 0.8% stainless steel powder having a particle size less than about 150 microns; and between about 0.05% and 0.2% aluminum powder.
Claim 3
Dependent Claim
21 words
The infiltrating composition in claim 1 wherein the copper-manganese alloy powder contains up to 1.5% silicon to provide a copper-manganese-silicon alloy.
Claim 4
Dependent Claim
27 words
The infiltrating composition in claim 2 wherein the copper-manganese-silicon alloy contains between about 60 to 70 weight parts copper and 40 to 30 weight parts of manganese.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |