Patents by Inventor William A. Kirn

William A. Kirn 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: 5418013
    Abstract: A method for decreasing the drying time of a wet coating by admixing said wet coating and at least one transient colorant in an amount effective to decrease the drying time, applying the admixture to a substrate, and drying the coating, is provided. The transient colorant may be, for example, a pH-sensitive colorant or a photobleaching colorant.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: May 23, 1995
    Assignee: Rohm and Haas Company
    Inventors: George F. Detrick, Lawrence S. Frankel, Ernest R. Gommel, William A. Kirn
  • Patent number: 4203859
    Abstract: As a modifier for carpet shampoos and the like, an aqueous composition containing a polymer component comprising an aqueous dispersion of an acrylic polymer, polyvalent metal ions, ammonia or a volatile amine to solubilize the copolymer, and optionally CO.sub.3 .dbd., HCO.sub.3.sup.-- or an anion of an amino acid. The acrylic polymer is a low molecular weight copolymer of 20-60 parts butyl acrylate, 0-25 parts styrene, 0-15 parts methyl methacrylate, and 40-60 parts of at least one of methacrylic acid, acrylic acid, and itaconic acid. Preferably the polymer contains at least about 5 parts of styrene, the styrene:butyl acrylate ratio being no more than 1:1. The pka of the polymer component is less than about 6.7 and the number average molecular weight of the polymer is about 2500-100,000. The viscosity in centipoises at 25% solids of polymer in water at 35.degree. C. and containing at least two equivalents of ammonium cation and at least 0.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: May 20, 1980
    Assignee: Rohm and Haas Company
    Inventors: William A. Kirn, David R. Gehman
  • Patent number: 4196190
    Abstract: Acrylic polymer solutions having superior properties when used as hair setting or holding resins are disclosed. Specific polymers disclosed are derived from (1) alkyl acrylates with 2-8 carbon alkyl groups, (2) methyl methacrylate, (3) hydroxyethyl methacrylate, and (4) methacrylic acid in proportions yielding a film forming resin readily soluble in shampoo, with a Tg between about 40.degree. C. and 80.degree. C., a molecular weight between about 25,000 and 250,000 and not more than 50 ppm of unreacted alkyl acrylate monomer.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: April 1, 1980
    Assignee: Rohm and Haas Company
    Inventors: David R. Gehman, William A. Kirn