Patents by Inventor Edwin Cropper

Edwin Cropper has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4302347
    Abstract: A liquid hard surface cleaning composition comprising, by weight, 1% to 20% of water-insoluble, particulate abrasive having a particle size in the range of 1 to 40 microns; 3% to 15% of a synthetic, organic, anionic detergent; 1% to 7.5% of an ethyleneoxylated alkanol nonionic detergent, the weight ratio of anionic detergent to nonionic detergent being from 1.75:1 to 3:1; 1% to 15% of a detergent builder salt, the weight ratio of builder salt to total detergent being in the range of 1:4 to 2:1; and an aqueous medium; the proportions of the components being so adjusted within the specified ranges that some of the detergent is present in liquid crystal form and the abrasive is maintained in stable suspension.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: November 24, 1981
    Assignee: Colgate-Palmolive Company
    Inventors: Alan Straw, Edwin Cropper, Alan Dillarstone
  • Patent number: 4214915
    Abstract: The oven cleaner composition includes from 1 to 2% by weight sodium bicarbonate and from 14 to 17% by weight potassium bicarbonate in an aqueous solution in which the weight ratio of sodium bicarbonate to potassium bicarbonate is from 1:7 to 1:17. The composition can be applied to the surface before and/or after soiling.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: July 29, 1980
    Assignee: Colgate-Palmolive Company
    Inventors: Alan Dillarstone, Norman C. Lowe, Edwin Cropper
  • Patent number: 4188306
    Abstract: An aqueous soap solution that is comprised predominantly of high tallow soap and an alkali metal or ammonium aryl sulfonate hydrotrope, which soap exhibits the ability of remaining as a pumpable single phase solution even at low temperatures.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: February 12, 1980
    Assignee: Colgate-Palmolive Company
    Inventors: Alan Dillarstone, Norman Lowe, Edwin Cropper