Patent US3976479A successfully refreshed from Google Patents.
US3976479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy solution hardening with solute pairs
Assignee: Energy Research and Development Administration ERDA
•
Filing: 1974-03-12
•
Granted: 1976-08-24
•
Expires: 1994-03-12
Abstract
Abstract Solution hardened alloys are formed by using at least two solutes which form associated solute pairs in the solvent metal lattice. Copper containing equal atomic percentages of aluminum and palladium is an example.
Inventors
- 👤 John W. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:46
CPC Classifications
C; C22; C22C; C22C5/00; C22C1/00; C22C1/02; C22C9/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
42 words
A single phase alloy composition consisting essentially of a copper solvent metal and two solutes, said solutes existing as associated pairs within said solvent metal, said solutes being aluminum and palladium in percentages within the range of 1 to 4 atom percent.
Claim 2
Dependent Claim
42 words
A single phase alloy composition consisting essentially of a copper solvent metal and two solutes, said solutes existing as associated pairs within said solvent metal, said solutes being aluminum and palladium in percentages within the range of 1 to 4 atom percent.
Claim 3
Dependent Claim
15 words
The alloy of claim 1 wherein said aluminum and palladium are present in equal percentages.
References Cited (Backward Citations)
US1496269A
Cited
US2027994A
Cited
US1916602A
Cited
GB478126A
Cited
US2061897A
Cited
US2161574A
Cited
CH257785A
Cited
US3694273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |