US3706124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the pre-treating of metal sheets which are provided with a coating following a forming operation
Assignee: Bayer AG
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Filing: 1970-12-03
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Granted: 1972-12-19
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Expires: 1990-12-03
Abstract
Abstract This invention relates to an improved process for the pretreating of metallic materials wherein the metallic material is surface-treated, covered with a removable layer comprising a water soluble, film-forming organic polymer and at least one water soluble polymer with a molecular weight of up to substantially 2,000, subsequently formed and provided with a firmly adhering protective layer.
Inventors
- 👤 Lambis Leontaritis
- 👤 Nikolaus Schon
- 👤 Hans Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:22
CPC Classifications
C; C23; C23F; C23F15/00; C23D; C23D3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
13 words
A process as claimed in claim 1, wherein the metallic material is steel.
Claim 2
Dependent Claim
18 words
A process as claimed in claim 1, wherein the firmly adhering protective layer is a layer of enamel.
Claim 3
Dependent Claim
16 words
A process as claimed in claim 1, wherein the shaping operation is a non-machining shaping operation.
Claim 4
Dependent Claim
36 words
A process as claimed in claim 1, wherein the water-soluble film-forming organic polymer is a member selected from the group consisting of a polyethylene oxide, polyvinyl alcohol, hydroxymethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose and mixtures thereof.
Claim 5
Dependent Claim
103 words
A process as claimed in claim 5, wherein the water-soluble polymer of molecular weight up to substantially 2,000 is added to the film-forming polymer in a quantity of 1 to 75 percent of the film-forming polymer and is a member selected from the group consisting of polyethylene glycol, polypropylene glycol, polyvinyl ether, a reaction product of a phenol with ethylene oxide, a reaction product of an alcohol with ethylene oxide and mixtures thereof, the polymers being applied to the metallic material from dilute aqueous solution, the water being removed to leave a solid film and the film being removed by water after shaping.
Claim 6
Dependent Claim
33 words
A process as claimed in claim 6 wherein the metallic material is a steel sheet which is shaped in a press, the film being removed with water and the sheet thereafter being enamelled.
Claim 7
Dependent Claim
38 words
A process as claimed in claim 1, wherein the water-soluble polymer of molecular weight up to substantially 2,000 is added to the film-forming polymer in a quantity of 1 to 75 percent by weight of the film-forming polymer.
Claim 8
Dependent Claim
56 words
A process as claimed in claim 1, wherein the water-soluble polymer with a molecular weight of up to substantially 2,000 is a member selected from the group consisting of polyethylene glycol, polypropylene glycol, polyvinyl ether, a reaction product of a phenol with ethylene oxide, a reaction product of an alcohol with ethylene oxide and mixtures thereof.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |