Patents Assigned to Circle Chemical Company, Inc.
  • Testing system
    Patent number: 4812249
    Abstract: A aqueous system for testing magnetizable articles is provided by a master based slurry of magnetic particles including a corrosion inhibitor, surface tension adjusting agent, an antifoam agent, a viscosity adjustment element, and a buffering element to assist in the corrosion resistance.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: March 14, 1989
    Assignee: Circle Chemical Company, Inc.
    Inventor: Isabelle Y. Duminy-Kovarik
  • Testing system
    Patent number: 4701275
    Abstract: An aqueous system for testing magnetizable articles is provided by a water based slurry of magnetic particles including a corrosion inhibitor, surface tension adjusting agent, an antifoam agent, a viscosity adjustment element, and a buffering element to assist in the corrosion resistance.
    Type: Grant
    Filed: September 17, 1986
    Date of Patent: October 20, 1987
    Assignee: Circle Chemical Company, Inc.
    Inventor: Isabelle Y. Duminy-Kovarik