US3595985A
Expired / Lapsed
US
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Conversion coated aluminum conductor and method for preparation thereof
Assignee: Alcoa Corp
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Filing: 1969-08-26
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Granted: 1971-07-27
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Expires: 1989-08-26
Abstract
Abstract Preparation of aluminum conductor material and insulated multistrand cable made therefrom by zinc treatment of aluminum followed by chromate conversion coating of the thus treated aluminum and forming same into the insulated cable.
Inventors
- 👤 Walter G Zelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:56
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/02; H01B1/023; H01B9/00; H01B9/006; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/12611; Y10T428/12736; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2949; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
Aluminum wire adapted for stranded conductor usage, said wire having as a base coating thereon a zinc film with a chromate conversion coating thereover.
Claim 2
Dependent Claim
18 words
A multistrand conductor comprising a plurality of wound strands of the wire of claim 2 surrounded with insulation.
Claim 3
Dependent Claim
10 words
The conductor of claim 3 wherein the insulation is polytetrafluoroethylene.
Claim 4
Dependent Claim
36 words
A process for decreasing the electrical contact resistanCe and increasing the corrosion resistance of aluminum which comprises first applying a film to the aluminum by zinc immersion treatment and then forming a chromate conversion coating thereover.
Claim 5
Dependent Claim
14 words
The process of claim 5 wherein the zinc coating is a zinc immersion coating.
Claim 6
Dependent Claim
23 words
The process of claim 5 wherein the chromate conversion coating is formed by a solution containing CrO3 and a fluoride radical supplying F.
Claim 7
Dependent Claim
65 words
The process of claim 5 wherein the chromate conversion coating is applied from a solution containing from about 0.05 to about 2.50 g./l. CrO3 and from about 0.01 to about 0.50 g./1. F, at a pH of from about 2 to about 4, at a temperature of from about 120* to 200* F., and for a period of from about 15 to about 60 seconds.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |