US3773579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating aluminum strip
Assignee: Olin Corp
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Filing: 1971-07-15
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Granted: 1973-11-20
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Expires: 1991-07-15
Abstract
Abstract The disclosure teaches a method for producing an improved surface on certain aluminum alloys. The process is characterized by applying certain organic compounds to aluminum strip, heating the coated strip to decompose said compound and generate atomic hydrogen, whereby said hydrogen is adsorbed and absorbed by the aluminum strip, cooling said strip, and physically altering the surface of said strip by applying at least one chemical compound thereto which reacts with said strip.
Inventors
- 👤 C Michelson
- 👤 S Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:25
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/16; C23; C23F; C23F1/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
A method according to claim 1 wherein said physical altering comprises treating the surface of said material in a manner selected from the group consisting of chemical etching and bright dipping.
Claim 2
Dependent Claim
18 words
A method according to claim 2 wherein said physical altering is by chemical etching in a caustic bath.
Claim 3
Dependent Claim
18 words
A method according to claim 2 wherein said physical altering is by bright dipping in an acid bath.
Claim 4
Dependent Claim
16 words
A method according to claim 2 wherein said organic compound contains at least 14 carbon atoms.
Claim 5
Dependent Claim
26 words
A method according to claim 2 wherein said coating is selected from the group consisting of hexadecane, butyl stearate, stearic acid, tri-butyl phosphate and butyl acrylate.
Claim 6
Dependent Claim
21 words
A method according to claim 2 wherein said coating is applied to selected areas of said surface to form a pattern.
Claim 7
Dependent Claim
18 words
A method according to claim 2 further including the step of anodizing said material following said physically altering.
Claim 8
Dependent Claim
21 words
A method according to claim 2 wherein said coating is applied in a uniform layer to the surface of said material.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |