Patent US1676162A successfully refreshed from Google Patents.
Patent US4428872A successfully refreshed from Google Patents.
US4428872A
Expired / Lapsed
US
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Composition to inhibit staining of porcelain surfaces by manganese
Assignee: Procter and Gamble Co
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Filing: 1982-03-22
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Granted: 1984-01-31
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Expires: 2002-03-22
Abstract
Abstract Composition to inhibit the staining of water-contacting surfaces, such as those in a toilet bowl, which is caused by manganese present in household water in the presence of an oxidizing material. Manganese staining is inhibited by supplying to the water 0.1 to 10 ppm of a substance selected from sodium polyacrylates and ethylene-maleic anhydride copolymers.
Inventors
- 👤 Robert H. Callicott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:38
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A composition adapted to deliver ingredients which inhibit manganese soiling in the toilet bowl comprising: A. about 5% of a material adapted to inhibit manganese staining, consisting essentially of copolymers of alternating ethylene and maleic acid anhydride having a molecular weight between about 20,000 and 100,000 atomic mass units; B. about 50% of a water-soluble surfactant consisting essentially of a surfactant selected from the group consisting of the hypochlorite-stable alkyl sulfates and paraffin sulfonates; and C. about 45% of optional ingredients selected from the group consisting of dyes, perfumes, isobornyl acetate, sodium chloride, sodium bromide and mixtures thereof; wherein said composition is essentially free of manganese (II) oxidating material and phosphate esters.
Claim 2
Dependent Claim
112 words
A composition adapted to deliver ingredients which inhibit manganese soiling in the toilet bowl comprising: A. about 5% of a material adapted to inhibit manganese staining, consisting essentially of copolymers of alternating ethylene and maleic acid anhydride having a molecular weight between about 20,000 and 100,000 atomic mass units; B. about 50% of a water-soluble surfactant consisting essentially of a surfactant selected from the group consisting of the hypochlorite-stable alkyl sulfates and paraffin sulfonates; and C. about 45% of optional ingredients selected from the group consisting of dyes, perfumes, isobornyl acetate, sodium chloride, sodium bromide and mixtures thereof; wherein said composition is essentially free of manganese (II) oxidating material and phosphate esters.
References Cited (Backward Citations)
US3308067A
Cited
US3303104A
Cited
US3380922A
Cited
US3462365A
Cited
US3933673A
Cited
US3790610A
Cited
US3969500A
Cited
US3954643A
Cited
US3956165A
Cited
US4083794A
Cited
US4132735A
Cited
US4115293A
Cited
US4129423A
Cited
US4175100A
Cited
US4374572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |