Patent US3132055A successfully refreshed from Google Patents.
US3132055A
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Antirusting surface treating method for iron and steel products
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1961-07-24
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Granted: 1964-05-05
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 Tanaka Tadashi
- 👤 Ayusawa Saburo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:46
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24; C23C22/33; C09; C09D; C09D135/00; C09D5/00; C09D5/08; C23C22/26; C23C22/28; C23C22/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR SURFACE TREATING A METALLIC ARTICLE TO PRODUCE A CORROSION-RESISTANT FILM THEREON BY APPLYING THERETO WATER-SOLUBLE FILM-FORMING MATERIAL WHICH COMPRISES COATING THE SURFACE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF IRON, GALVANIZED IRON ZINC, TIN PLATED IRON, TIN AND STEEL WITH AN ACIDIC AQUEOUS FILM-FORMING SOLUTION CONSISTING ESSENTIALLY OF MALEIC ACID COPOLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL METHYL ETHER-MALEIC ACID COPOLYMER, POLYETHYLENE-MALEIC ACID COPOLYMER AND POLYVINYL ACETATEIMALEIC ACID COPOLYMER, AND WATER-SOLUBLE HEXAVALENT CHROMIUM COMPOUND AND WATER, AND DRYING THE THUS-COATED ARTICLE TO FORM A CORROSION-RESISTANT FILM THEREON.
Claim 2
Independent Claim
93 words
A METHOD FOR SURFACE TREATING A METALLIC ARTICLE TO PRODUCE A CORROSION-RESISTANT FILM THEREON BY APPLYING THERETO WATER-SOLUBLE FILM-FORMING MATERIAL WHICH COMPRISES COATING THE SURFACE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF IRON, GALVANIZED IRON ZINC, TIN PLATED IRON, TIN AND STEEL WITH AN ACIDIC AQUEOUS FILM-FORMING SOLUTION CONSISTING ESSENTIALLY OF MALEIC ACID COPOLYMER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL METHYL ETHER-MALEIC ACID COPOLYMER, POLYETHYLENE-MALEIC ACID COPOLYMER AND POLYVINYL ACETATEIMALEIC ACID COPOLYMER, AND WATER-SOLUBLE HEXAVALENT CHROMIUM COMPOUND AND WATER, AND DRYING THE THUS-COATED ARTICLE TO FORM A CORROSION-RESISTANT FILM THEREON.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |