Patents by Inventor William C. Prentiss

William C. Prentiss 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).

  • Process for producing leather
    Patent number: 4526581
    Abstract: This invention is directed to an improved process for producing leather and products resulting thereby. The process employs methacrylic acid/alkyl acrylate copolymers having a narrow range of molecular weight and produces leather which is flexible, with a smooth grain and well-filled and which is resistant to detannage by washing with alkaline solution.
    Type: Grant
    Filed: February 7, 1983
    Date of Patent: July 2, 1985
    Assignee: Rohm and Haas Company
    Inventors: William C. Prentiss, David N. Price
  • Chrome utilization in chrome tanning
    Patent number: 4327997
    Abstract: Method of chrome tanning wherein, after unhairing and bating, a water soluble amino compound is provided in an acidified hide stock solution prior to or simultaneously with addition of a chrome tanning agent. The amount of chrome tanning agent required in the charge, and therefore the amount of chrome in the exhaust liquor or effluent, is thereby substantially reduced, thus providing greater control over pollution due to chrome in leather manufacturing operations.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: May 4, 1982
    Assignee: Rohm and Haas Company
    Inventors: William C. Prentiss, Inaganti V. Prasad
  • Stabilized tanning composition comprising a reaction product of (a) polyaldehyde (b) secondary amine and (c) an alcohol and method
    Patent number: 4270912
    Abstract: A leather tanning composition is comprised of the reaction product of a polyaldehydic compound, a secondary amine and a monohydric alcohol.
    Type: Grant
    Filed: June 26, 1979
    Date of Patent: June 2, 1981
    Assignee: Seton Company
    Inventor: William C. Prentiss