Patents by Inventor John M. Conover

John M. Conover 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).

  • Method for preserving wooden cross-tie
    Patent number: 5236711
    Abstract: A preservative-bearing pad and a method of using same to treat the interface between a railroad cross tie and tie plate. A sandwich of water-soluble active ingredient disposed between two layers of biodegradable hydrophilic backing is simply placed on the adzed portion of a cross tie prior to installation of the tie plate and rail during a rail laying or relaying operation.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: August 17, 1993
    Assignee: Osmose Wood Preserving
    Inventors: David J. Ostby, John M. Conover
  • Wood preserving pad
    Patent number: 5043225
    Abstract: A preservative-bearing pad and a method of using same to treat the interface between a railroad cross tie and tie plate. A sandwich of water-soluble active ingredient disposed between two layers of biodegradable hydrophilic backing is simply placed on the adzed portion of a cross tie prior to installation of the tie plate and rail during a rail laying or relaying operation.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: August 27, 1991
    Inventors: David J. Ostby, John M. Conover