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US3904543A
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Detergent film
Assignee: DowBrands Inc
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Filing: 1973-08-07
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Granted: 1975-09-09
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Expires: 1993-08-07
Abstract
Abstract A pliant, self-sustaining film formed by evaporation of water from a solution comprising water; a nonionic detergent; an alkylene maleic anhydride copolymer; and a small amount of an alkali hydroxide is capable upon dissolving in water of providing a highly effective detergent solution.
Inventors
- 👤 James G Knighten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:48
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PLIANT, NON-TACKY, SELF-SUSTAINING FILM HAVING A WATER CONTENT OF ABOUT 2% BY WEIGHT AND FORMED BY CASTING UPON A RECEPTIVE SURFACE TO PERMIT EVAPORATION OF WATER, FORM A SOLUTION CONSISTING OF ABOUT 83 PARTS OF WATER, 10 PARTS OF AN ETHOXYLATED NONYL PHENOL HAVING FROM 9-10 MOLS OF ETHYLENE OXIDE, 4 PARTS OF METHYL VINYL ETHER MALEIC ANTHYDRIDE COPOLYMER, AND ABOUT 3 PARTS OF A 20% W/W SODIUM HYDROXIDE SOLUTION, SAID SOLUTION BEING HEATED TO ABOUT 195*F FOR ABOUT THIRTY MINUTES, THEN COOLED TO THE POINT OF CLARITY AT WHICH THE PH IS ABOUT 4.0-4.4.
Claim 2
Dependent Claim
96 words
A PLIANT, NON-TACKY, SELF-SUSTAINING FILM HAVING A WATER CONTENT OF ABOUT 2% BY WEIGHT AND FORMED BY CASTING UPON A RECEPTIVE SURFACE TO PERMIT EVAPORATION OF WATER, FORM A SOLUTION CONSISTING OF ABOUT 83 PARTS OF WATER, 10 PARTS OF AN ETHOXYLATED NONYL PHENOL HAVING FROM 9-10 MOLS OF ETHYLENE OXIDE, 4 PARTS OF METHYL VINYL ETHER MALEIC ANTHYDRIDE COPOLYMER, AND ABOUT 3 PARTS OF A 20% W/W SODIUM HYDROXIDE SOLUTION, SAID SOLUTION BEING HEATED TO ABOUT 195*F FOR ABOUT THIRTY MINUTES, THEN COOLED TO THE POINT OF CLARITY AT WHICH THE PH IS ABOUT 4.0-4.4.
References Cited (Backward Citations)
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |