US3897287A
Expired / Lapsed
US
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Method of sealing and desmudging of anodized aluminum
Assignee: Alcoa Corp
•
Filing: 1972-08-11
•
Granted: 1975-07-29
•
Expires: 1992-08-11
Abstract
Abstract Addition of sulfate to hydrolyzable metal salt sealing solution to promote subsequent mineral acid removal of smudge from the surface of anodized aluminum.
Inventors
- 👤 Raymond J Meyer
- 👤 Jr Ford Simpson
- 👤 Michael P Boland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:12
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/246
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
1 words
WATER,
Claim 2
Dependent Claim
1 words
WATER,
Claim 3
Dependent Claim
2 words
WATER, AND
Claim 4
Dependent Claim
2 words
WATER, AND
Claim 5
Dependent Claim
41 words
In a process for sealing anodized aluminum in an aqueous bath containing a hydrolyzable metallic salt followed by removal of smudge with a mineral acid, the improvement which comprises: a. sealing said anodized aluminum in an aqueous bath consisting essentially of:
Claim 6
Dependent Claim
41 words
In a process for sealing anodized aluminum in an aqueous bath containing a hydrolyzable metallic salt followed by removal of smudge with a mineral acid, the improvement which comprises: a. sealing said anodized aluminum in an aqueous bath consisting essentially of:
Claim 7
Dependent Claim
1 words
water,
Claim 8
Dependent Claim
1 words
water,
Claim 9
Dependent Claim
3 words
mineral acid, and
Claim 10
Dependent Claim
3 words
mineral acid, and
Claim 11
Dependent Claim
1 words
water,
Claim 12
Dependent Claim
1 words
water,
Claim 13
Dependent Claim
2 words
water, and
Claim 14
Dependent Claim
2 words
water, and
Claim 15
Dependent Claim
32 words
at least about 15% by weight of a mineral acid selected from the group consisting of nitric, hydrochloric, sulfuric, phosphoric, and chromic acid, without adversely affecting the seal produced by said sealing.
Claim 16
Dependent Claim
32 words
at least about 15% by weight of a mineral acid selected from the group consisting of nitric, hydrochloric, sulfuric, phosphoric, and chromic acid, without adversely affecting the seal produced by said sealing.
Claim 17
Dependent Claim
29 words
at least one non-sulfate hydrolyzable metal salt selected from the group consisting of nickel acetate and cobalt acetate comprising at least about 1 g/l of said sealing bath, and
Claim 18
Dependent Claim
29 words
at least one non-sulfate hydrolyzable metal salt selected from the group consisting of nickel acetate and cobalt acetate comprising at least about 1 g/l of said sealing bath, and
Claim 19
Dependent Claim
10 words
water without adversely affecting the seal produced by said sealing.
Claim 20
Dependent Claim
10 words
water without adversely affecting the seal produced by said sealing.
Claim 21
Dependent Claim
21 words
The improvement of claim 1 wherein the non-sulfate hydrolyzable metal salt comprises at least about 1 g/l of said sealing bath.
Claim 22
Dependent Claim
8 words
at least one non-sulfate hydrolyzable metal salt, and
Claim 23
Dependent Claim
8 words
at least one non-sulfate hydrolyzable metal salt, and
Claim 24
Dependent Claim
32 words
AT LEAST ABOUT 15% BY WEIGHT OF A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC, HYDROCHLORIC, SULFURIC, PHOSPHORIC, AND CHROMIC ACID, WITHOUT ADVERSELY AFFECTING THE SEAL PRODUCED BY SAID SEALING.
Claim 25
Dependent Claim
32 words
AT LEAST ABOUT 15% BY WEIGHT OF A MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF NITRIC, HYDROCHLORIC, SULFURIC, PHOSPHORIC, AND CHROMIC ACID, WITHOUT ADVERSELY AFFECTING THE SEAL PRODUCED BY SAID SEALING.
Claim 26
Dependent Claim
71 words
AT LEAST ONE NON-SULFATE HYDROLYZABLE METAL SALT SELECTED FROM THE GROUP CONSISTING OF NICKEL ACETATE AND COBALT ACETATE COMPRISING AT LEAST ABOUT 1 G/L OF SAID SEALING BATH, AND 3. 375-2,000 PPM SOLUBLE SULFATE SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, NICKEL SULFATE, ALUMINUM SULFATE, AND SODIUM SULFATE, AND B. THEREAFTER REMOVING SMUDGE FORMED ON SAID ANODIZED ALUMINUM BY SAID SEALING BY TREATING SAMD WITH A SOLUTION CONSISTING ESSENTIALLY OF:
Claim 27
Dependent Claim
71 words
AT LEAST ONE NON-SULFATE HYDROLYZABLE METAL SALT SELECTED FROM THE GROUP CONSISTING OF NICKEL ACETATE AND COBALT ACETATE COMPRISING AT LEAST ABOUT 1 G/L OF SAID SEALING BATH, AND 3. 375-2,000 PPM SOLUBLE SULFATE SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, NICKEL SULFATE, ALUMINUM SULFATE, AND SODIUM SULFATE, AND B. THEREAFTER REMOVING SMUDGE FORMED ON SAID ANODIZED ALUMINUM BY SAID SEALING BY TREATING SAMD WITH A SOLUTION CONSISTING ESSENTIALLY OF:
Claim 28
Dependent Claim
28 words
375-2,000 ppm soluble sulfate (SO4 ) and b. thereafter removing smudge formed on said anodized aluminum by said sealing by treating same with a solution consisting essentially of:
Claim 29
Dependent Claim
28 words
375-2,000 ppm soluble sulfate (SO4 ) and b. thereafter removing smudge formed on said anodized aluminum by said sealing by treating same with a solution consisting essentially of:
Claim 30
Dependent Claim
31 words
The improvement of claim 1 wherein the soluble sulfate is supplied by at least one sulfate selected from the group consisting of sulfuric acid, nickel sulfate, aluminum sulfate and sodium sulfate.
Claim 31
Dependent Claim
41 words
375-2,000 ppm soluble sulfate selected from the group consisting of sulfuric acid, nickel sulfate, aluminum sulfate, and sodium sulfate, and b. thereafter removing smudge formed on said anodized aluminum by said sealing by treating same with a solution consisting essentially of:
Claim 32
Dependent Claim
41 words
375-2,000 ppm soluble sulfate selected from the group consisting of sulfuric acid, nickel sulfate, aluminum sulfate, and sodium sulfate, and b. thereafter removing smudge formed on said anodized aluminum by said sealing by treating same with a solution consisting essentially of:
Claim 33
Dependent Claim
26 words
The improvement of claim 1 wherein the mineral acid comprises at least one acid selected from the group consisting of nitric, hydrochloric, sulfuric, phosphoric and chromic.
Claim 34
Dependent Claim
19 words
The improvement of claim 1 wherein the concentration of the mineral acid is at least about 15% by weight.
Claim 35
Dependent Claim
19 words
The improvement of claim 1 wherein the concentration of the mineral acid is at least about 20% by weight.
Claim 36
Dependent Claim
23 words
The improvement of claim 1 wherein the non-sulfate hydrolyzable metallic salt is selected from the group consisting of nickel acetate and cobalt acetate.
Claim 37
Dependent Claim
24 words
IN A PROCESS FOR SEALING AND DESMUDGING ANODIZED ALUMINUM, THE IMPROVEMENT WHICH COMPRISES: A. SEALING SAID ANODIZED ALUMINUM IN A BATH CONSISTING ESSENTIALLY OF:
Claim 38
Dependent Claim
24 words
IN A PROCESS FOR SEALING AND DESMUDGING ANODIZED ALUMINUM, THE IMPROVEMENT WHICH COMPRISES: A. SEALING SAID ANODIZED ALUMINUM IN A BATH CONSISTING ESSENTIALLY OF:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |