US3792997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum-copper-magnesium powder metallurgy
Assignee: Individual
•
Filing: 1972-05-17
•
Granted: 1974-02-19
•
Expires: 1992-05-17
Abstract
Abstract Sintered compacts of aluminum-base powder containing copper and magnesium are obtained with superior mechanical properties by using as the copper component a non-leafing type copper flake containing on its surface from about 0.03 to a maximum of about 0.05 weight percent of a ''''leafing'''' component such as stearic acid or oleic acid, and the like.
Inventors
- 👤 S Storchheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:46
CPC Classifications
B; B22; B22F; B22F1/00; B22F1/06; B22F1/068
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
A powder mixture according to claim 1 which has been physically mixed for a continuous period of at least 1/2 hour.
Claim 2
Dependent Claim
22 words
A powder mixture according to claim 1 which has been physically mixed for a continuous period of at least 1 1/2 hours.
Claim 3
Dependent Claim
34 words
A powder mixture according to claim 1 in which the copper flake powder is present in amount of about 4 weight percent and the magnesium is present in amount of about 0.6 weight percent.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |