Patents by Inventor Walter J. Polestak

Walter J. Polestak 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).

  • ORGANO-NEUTRALIZED CALCINED KAOLINS FOR USE IN SILICONE RUBBER-BASED FORMULATIONS
    Publication number: 20100324197
    Abstract: Disclosed herein are organo-neutralized calcined kaolins comprising calcined kaolin treated with at least one basic organic compound, a composition comprising the organo-neutralized calcined, and use of the organo-neutralized calcined kaolin in silicone rubber formulations. Further disclosed herein are a method of making the organo-neutralized calcined kaolin and a method of making a silicone rubber formulation comprising the organo-neutralized calcined kaolin.
    Type: Application
    Filed: August 27, 2010
    Publication date: December 23, 2010
    Inventors: Robert W. Bradshaw, Walter J. Polestak, Edward J. Sare
  • INORGANO-NEUTRALIZED CALCINED KAOLINS FOR USE IN SILICONE RUBBER-BASED FORMULATIONS
    Publication number: 20090023849
    Abstract: Disclosed herein are inorgano-neutralized calcined kaolin comprising calcined kaolin treated with at least one basic inorganic compound, a composition comprising the inorgano-neutralized calcined, and use of the inorgano-neutralized calcined kaolin in silicone rubber formulation. Further disclosed herein are a method of making the inorgano-neutralized calcined kaolin and a method of making a silicone rubber formulation comprising the inorgano-neutralized calcined kaolin.
    Type: Application
    Filed: October 5, 2005
    Publication date: January 22, 2009
    Applicant: Imerys Kaolin, Inc.
    Inventors: Robert Bradshaw, Walter J. Polestak, Edward Sare
  • Organo-Neutralized Calcined Kaolins for Use in Silicone Rubber-Based Formulations
    Publication number: 20080262142
    Abstract: Disclosed herein are organo-neutralized calcined kaolin comprising calcined kaolin treated with at least one basic organic compound, a composition' comprising the organo-neutralized calcined, and use of the organo-neutralized calcined kaolin in silicone rubber formulation. Further disclosed herein are a method of making the organo-neutralized calcined kaolin and a method of making a silicone rubber formulation comprising the organo-neutralized calcined kaolin.
    Type: Application
    Filed: October 5, 2005
    Publication date: October 23, 2008
    Applicant: Imerys Kaolin, Inc.
    Inventors: Robert W. Bradshaw, Walter J. Polestak, Edward J. Sare
  • High solids processing of kaolinitic clays with post-leaching oxidation
    Patent number: 4618374
    Abstract: A process for beneficiating a poor grade crude kaloinitic clay mineral to produce a clay filler for use in papermaking to improve the brightness of the paper product. The crude kaolin clay is blunged with water containing a dispersing agent to form a high solids fluid aqueous clay suspension. This clay suspension is then screened and fractionated to reduce the particle size thereof to 92-95% finer than 2 microns. The fractionated clay suspension is treated with an alkaline leaching solution containing a reducing agent effective in converting ferric ions to ferrous ions and, preferably, a water-soluble anionic phosphate. The leached clay suspension, which has a solids content of at least 55%, is then treated with an oxidizing agent to oxidize unreacted leaching agent and byproducts formed during the leaching process.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: October 21, 1986
    Assignee: Georgia Kaolin Company, Inc.
    Inventors: Thomas D. Thompson, III, Walter J. Polestak, Robert W. Bradshaw