US3770515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High conductivity aluminum alloys
Assignee: Novelis Corp
•
Filing: 1972-05-15
•
Granted: 1973-11-06
•
Expires: 1992-05-15
Abstract
Abstract A process for obtaining a high conductivity material comprising the providing of a material from the group consisting of commercial purity aluminum and aluminum alloys wherein the alloy contains at least one alloying element in an amount of from 0.1 to 1.5 percent weight, the total not exceeding 3.0 weight percent, cold deforming the material at least 15 percent below 500* F, heating for at least 20 minutes in the range of 400* to 800* F and cooling.
Inventors
- 👤 F Besel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:01
CPC Classifications
C; C22; C22C; C22C21/00; H; H01; H01B; H01B1/00; H01B1/02; H01B1/023
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
A process according to claim 1 wherein said material is an aluminum alloy containing magnesium.
Claim 2
Dependent Claim
15 words
A process according to claim 1 wherein said material is an aluminum alloy containing copper.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein said material is an aluminum alloy containing silicon.
Claim 4
Dependent Claim
13 words
A process according to claim 1 wherein said material is commercial purity aluminum.
Claim 5
Dependent Claim
16 words
A process according to claim 1 wherein said heating step (C) allows precipitation to approach equilibrium.
Claim 6
Dependent Claim
20 words
A process according to claim 1 wherein the resultant product has an electrical conductivity of from 57 to 64 IACS.
References Cited (Backward Citations)
US2572562A
Cited
US3697260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |