US4110129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post treatment of conversion-coated zinc surfaces
Assignee: Henkel Corp
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Filing: 1977-02-03
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Granted: 1978-08-29
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Expires: 1997-02-03
Abstract
Abstract Disclosed is a process wherein a conversion coated zinc or zinc alloy surface is post-treated with an aqueous solution comprising at least 0.02 g/l titanium ion and at least 0.1 g/l of an adjuvant selected from phosphoric acid, phytic acid, tannin, the salts and esters of the foregoing, and hydrogen peroxide.
Inventors
- 👤 Yasunobu Matsushima
- 👤 Kuniji Yashiro
- 👤 Hideaki Kaneko
- 👤 Masanori Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:26
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/82; C23C22/83
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
64 words
A chromium-free process for treating an oxide or phosphate conversion coated zinc or zinc alloy surface comprising contacting the surface with an aqueous post-treatment solution comprising at least 0.02 g/l of titanium ion and at least 0.1 g/l of at least one adjuvant selected from the group consisting of phosphoric acid, phytic acid, tannin, the salts or esters of the foregoing and hydrogen peroxide.
Claim 2
Dependent Claim
64 words
A chromium-free process for treating an oxide or phosphate conversion coated zinc or zinc alloy surface comprising contacting the surface with an aqueous post-treatment solution comprising at least 0.02 g/l of titanium ion and at least 0.1 g/l of at least one adjuvant selected from the group consisting of phosphoric acid, phytic acid, tannin, the salts or esters of the foregoing and hydrogen peroxide.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the post-treatment solution is adjusted to a pH value in the range of about 2 to 6.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the surface is subsequently painted.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the titanium ion concentration in the post-treatment solution is not in excess of 5 g/l.
Claim 6
Dependent Claim
15 words
The process of claim 4 wherein the titanium concentration is between 0.05 and 2.5 g/l.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein the adjuvant concentration in the post-treatment solution is not in excess of 10 g/l.
Claim 8
Dependent Claim
15 words
The process of claim 6 wherein the adjuvant concentration is between 0.2 and 5 g/l.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |