Patent US3248350A successfully refreshed from Google Patents.
US3248350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water insoluble coating of methyl vinyl ether-maleic anhydride copolymer, hydroxyethyl cellulose and phosphoric acid
Assignee: Hooker Chemical Corp
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Filing: 1963-09-11
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Granted: 1966-04-26
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Expires: 1983-09-11
Abstract
No abstract record available.
Inventors
- 👤 Ann M Triggle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:12
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; C; C09; C09D; C09D101/00; C09D101/08; C09D101/26; C09D101/28; C09D135/00; C09D135/08; C09D5/00; C09D5/08; C09D5/12; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/23; C23C22/24; C23C22/33
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
AN IMPROVED COATING COMPOSITION FOR FORMING ADHERENT WATER-INSOLUBLE CORROSION RESISTANT COATINGS ON METALLIC SURFACES COMPRISING AN AQUEOUS SOLUTION CONTAINING A MIXTURE OF HYDROXYETHYL CELLULOSE AND A COPOLYMER OF METHYL VINYL ETHER AND MALEIC ANHYDRIDE PRESENT IN AN AMOUNT TO PRODUCE A VISCOSITY OF FROM ABOUT 50 TO ABOUT 100 CENTIPOISES, AND FROM ABOUT 1% TO ABOUT 3% PHOSPHORIC ACID.
Claim 2
Dependent Claim
59 words
AN IMPROVED COATING COMPOSITION FOR FORMING ADHERENT WATER-INSOLUBLE CORROSION RESISTANT COATINGS ON METALLIC SURFACES COMPRISING AN AQUEOUS SOLUTION CONTAINING A MIXTURE OF HYDROXYETHYL CELLULOSE AND A COPOLYMER OF METHYL VINYL ETHER AND MALEIC ANHYDRIDE PRESENT IN AN AMOUNT TO PRODUCE A VISCOSITY OF FROM ABOUT 50 TO ABOUT 100 CENTIPOISES, AND FROM ABOUT 1% TO ABOUT 3% PHOSPHORIC ACID.
Claim 3
Dependent Claim
97 words
AN IMPROVED COATING COMPOSITION FOR FORMING ADHERENT WATER-INSOLUBLE CORROSION RESISTANT COATINGS ON METALLIC SURFACES COMPRISING AN AQUEOUS SOLUTION CONTAINING A MIXTURE OF HYDROXYETHYL CELLULOSE AND A COPOLYMER OF METHYL VINYL ETHER AND MALEIC ANHYDRIDE PRESENT IN AN AMOUNT TO PRODUCE VISCOSITY OF FROM ABOUT 50 TO ABOUT 100 CENTIPOISES, FROM ABOUT 1% TO ABOUT 3% PHOSPHORIC ACID, AND A WATER-SOLUBLE HEXAVALENT CHROMIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIC ACID, CHROMATES AND DICHROMATES OF THE ALKALI METALS, AS WELL AS MIXTURES THEREOF PRESENT IN AN AMOUNT OF FROM ABOUT 1% TO ABOUT 5% CALCULATED AS CRO3.
Claim 4
Dependent Claim
97 words
AN IMPROVED COATING COMPOSITION FOR FORMING ADHERENT WATER-INSOLUBLE CORROSION RESISTANT COATINGS ON METALLIC SURFACES COMPRISING AN AQUEOUS SOLUTION CONTAINING A MIXTURE OF HYDROXYETHYL CELLULOSE AND A COPOLYMER OF METHYL VINYL ETHER AND MALEIC ANHYDRIDE PRESENT IN AN AMOUNT TO PRODUCE VISCOSITY OF FROM ABOUT 50 TO ABOUT 100 CENTIPOISES, FROM ABOUT 1% TO ABOUT 3% PHOSPHORIC ACID, AND A WATER-SOLUBLE HEXAVALENT CHROMIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CHROMIC ACID, CHROMATES AND DICHROMATES OF THE ALKALI METALS, AS WELL AS MIXTURES THEREOF PRESENT IN AN AMOUNT OF FROM ABOUT 1% TO ABOUT 5% CALCULATED AS CRO3.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |