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US3754941A Expired / Lapsed US ⏱️ 0.0 years remaining

Removal of metallic stains from porcelain surfaces

Assignee: Colgate Palmolive Co
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Filing: 1971-01-04
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Granted: 1973-08-28
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Expires: 1991-01-04
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Abstract

Abstract This disclosure relates to cleansing compositions having particular utility as a metallic stain remover from hard surfaces such as porcelain, comprising an oxidant capable of oxidizing the metal in a practical time such as the metallic ions ferric, stannous, cupric and mercuric and non-metallic oxidants such as hydrogen peroxide, a flouride solubilizer and a halide promotor, said composition having a pH of 0.5 - 5. Additives such as detergents, perfumes, fillers, colorants, etc. may be included provided they do not adversely affect the stain removing properties of the composition. Although aluminum pot marks are most often encountered in normal household cleaning, said cleansers are effective against other metallic stains such as iron, tin, magnesium, etc.

Inventors

  • 👤 R Burke

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 19:00
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/10

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 135 words
A composition for removing metallic stains of aluminum, magnesium, tin and iron from ceramic surfaces consisting essentially of a water-soluble metal salt oxidant, a solubilizer and a water-soluble halide promoter wherein said oxidant and solubilizer are present in 2 to 20 percent by weight and are selected from the group consisting of cupric fluorosilicate, ferric fluorosilicate, silver fluoride, silver fluorosilicate, and stannous fluoride; said halide promotor is present in about 1 to 20 percent by weight and is selected from the group consisting of sodium, potassium, magnesium and calcium chlorides and bromides, and said oxidant, solubilizer, and promoter being present in an inert carrier selected from the group consisting of water, silex, feldspar, pumice, tripoli, kieselguhr, diatomaceous earth and chalk and said composition having a pH of about 0.5 to 5 in an aqueous medium.
Claim 2
Dependent Claim 136 words
A composition for removing metallic stains of aluminum, magnesium, tin and iron from ceramic surfaces consisting essentially of a water-soluble metal salt oxidant, a solubilizer and a water-soluble halide promoter wherein the oxidant and promoter are present in about 2 to 20 percent and are selected from the group consisting of cupric chloride, cupric bromide, stannous chloride, ferric chloride and auric chloride; and the solubilizer is present in about 0.5 to 10 percent by weight and selected from the group consisting of ammonium, magnesium, zinc and sodium fluorosilicate, sodium fluoride and ammonium bifluoride, and said oxidant, solubilizer, and promoter being present in an inert carrier selected from the group consisting of water, silex, feldspar, pumice, tripoli, kieselguhr, diatomaceous earth, and chalk and said composition having a pH of about 0.5 to 5 in an aqueous medium.

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) 1976-08-27 1977-02-26 1977-08-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-27 1981-02-26 1981-08-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-27 1985-02-26 1985-08-28 $7700.00 Window Closed / Lapsed

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