Patents by Inventor Robert W. Koch

Robert W. Koch 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: 4737195
    Abstract: An activator composition having increased effectiveness and life when used in an aqueous alkaline stripper solution at elevated temperatures to remove siccative coatings from substrates containing two essential components A and B. Component A consists essentially of at least one of an ethoxylated tetrahydrofurfuryl, a mixture of an ethoxylated tetrahydrofurfuryl and an ethoxylated furfuryl, N-methyl-2-pyrrolidone and N-(2-hydroxyethyl)-2-pyrrolidine. Component B consists essentially of at least one of N-phenyl-diethanolamine, furfurylamine, tetrahydrofurfurylamine, octadecylamine, butoxypropanolamine and N-amino-morpholine.
    Type: Grant
    Filed: April 1, 1986
    Date of Patent: April 12, 1988
    Assignee: Amchem Products
    Inventors: Carmen M. Carandang, Robert W. Koch
  • Patent number: 4518518
    Abstract: A cold paint stripper composition and replenisher composition for removing paint from solid surfaces comprising an aqueous composition containing a chloroacetic acid, a relatively low concentration of a C.sub.1 -C.sub.3 chlorinated hydrocarbon, an anionic sulfonate, naphthenic acid, a sorbitan C.sub.12 -C.sub.18 ester, and, optionally, a corrosion inhibitor, tetrahydrofuran, paraffin wax, and formic acid.
    Type: Grant
    Filed: February 14, 1984
    Date of Patent: May 21, 1985
    Assignee: Amchem Products, Inc.
    Inventor: Robert W. Koch
  • Patent number: 4246130
    Abstract: A method and composition are disclosed for the stripping of polymer coatings from coated metal surfaces. The composition comprises methylene chloride, formic acid, chlorinated acetic acid and a surfactant selected from the class consisting of sulfonated castor oil and alkylbenzene sulfonic acid and salts thereof, wherein the alkyl group has from about 10 to about 14 carbon atoms.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: January 20, 1981
    Assignee: Amchem Products, Inc.
    Inventor: Robert W. Koch
  • Patent number: 3993804
    Abstract: A process for removing paint from rubber surfaces employing an acidic stripping solution comprising sulfuric acid and preferably one or more anionic wetting agents.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: November 23, 1976
    Assignee: Amchem Products, Inc.
    Inventors: Newton W. McCready, Robert W. Koch