Patents by Inventor Robert Chwalik

Robert Chwalik 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).

  • Aqueous corrosion inhibitor formulations
    Patent number: 5702631
    Abstract: The present invention provides aqueous concentrated corrosion inhibition formulations suitable for addition to depleted antifreeze/coolant compositions or corrosive water that use a mixture of polymeric polycarboxylates, azoles, nitrate salts, phosphates, stabilized silicates and transition metal compounds which reduces the corrosion rate and is effective at relatively low concentrations. The formulations are particularly suitable for automotive applications.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 30, 1997
    Assignee: Ashland Inc.
    Inventors: John J. Conville, Robert Chwalik, Shrikant V. Desai, David E. Turcotte, James T. Lyon