US3787248A
Expired / Lapsed
US
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Process for preparing aluminum alloys
Assignee: Individual
•
Filing: 1972-09-25
•
Granted: 1974-01-22
•
Expires: 1992-09-25
Abstract
Abstract The present invention teaches a process for preparing high strength, improved formability aluminum base alloys suitable for use as can end stock, said high strength aluminum material of the present invention being readily compatible with aluminum can body material. The present invention also teaches an improved aluminum can having ends and body of substantially the same aluminum base alloy, which can as a whole is especially convenient to process in scrap reclamation procedures.
Inventors
- 👤 J Winter
- 👤 W Setzer
- 👤 H Cheskis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:59
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/04; C22F1/047; B; B65; B65D; B65D17/00; B65D17/28; B65D17/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
13 words
A process according to claim 1 wherein steps (E) and (F) are repeated.
Claim 2
Dependent Claim
26 words
A process according to claim 2 wherein the material is held in step (F) for a period of time of from 30 minutes to 8 hours.
Claim 3
Dependent Claim
47 words
A process according to claim 1 wherein the material is thermally stabilized following step (F) at a temperature of from 250* to 450*F for a period of time defined by the following formula: T (12 + log t) 12,500, wherein T and t are as defined above.
Claim 4
Dependent Claim
22 words
A process according to claim 4 wherein following step (F) the material is coated with a polymeric material at an elevated temperature.
Claim 5
Dependent Claim
16 words
A process according to claim 5 wherein the material is thermally stabilized during the coating operation.
Claim 6
Dependent Claim
24 words
A process according to claim 4 wherein the material is thermally stabilized at a period of time of from 4 hours to 24 hours.
Claim 7
Dependent Claim
32 words
A process according to claim 2 wherein the material is rolled in step (D) with a total reduction of from 45 to 85 percent to a gage of 0.100 inch or above.
Claim 8
Dependent Claim
25 words
A process according to claim 2 wherein the material is cold rolled in step (E) with a total reduction of from 40 to 80 percent.
Claim 9
Dependent Claim
13 words
A process according to claim 2 wherein said alloy is aluminum alloy 3004.
Claim 10
Dependent Claim
61 words
A process according to claim 2 wherein said alloy contains: Silicon, up to 0.5 percent; iron, up to 1 percent; copper, up to 0.5 percent; zinc, up to 0.5 percent; chromium, up to 0.2 percent; beryllium, up to 0.01 percent; boron, up to 0.01 percent; titanium, up to 0.2 percent; others each up to 0.05 percent, total up to 0.20 percent.
Claim 11
Dependent Claim
17 words
A process according to claim 2 wherein steps (E) and (F) are repeated a plurality of times.
References Cited (Backward Citations)
US3318738A
Cited
US3486947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |