Patents by Inventor Robert H. Kindrick

Robert H. Kindrick 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).

  • Zinc oxide-zinc salt smoke suppressant/flame retardants
    Patent number: 4439572
    Abstract: This invention is directed to halogen-containing polymeric compositions containing a smoke suppressant/flame retardant comprising intimate mixtures of zinc oxide and zinc salts.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: March 27, 1984
    Assignee: The Sherwin-Williams Company
    Inventor: Robert H. Kindrick
  • Composite zinc oxide coating on an inert pigment core product and process
    Patent number: 4331706
    Abstract: This invention relates to a novel composite pigment and method for its manufacture which comprises a finely-divided inert pigment as a core which has deposited on its surface a non-photoconductive grade of zinc oxide, the weight ratio of zinc oxide ranging from about 30% to about 80% of the total weight of the composite pigment and the composite pigment characterized by a specific surface in excess of about 10 square meters/gram. In rubber compounding, the composite pigment reduces the cost of the zinc essential to produce quality products and the composite pigment because it is itself photoconductive is of utility in photoconductive end uses.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: May 25, 1982
    Assignee: The Sherwin-Williams Company
    Inventor: Robert H. Kindrick
  • Extended BaCO.sub.3 for brick scum prevention
    Patent number: 4226635
    Abstract: This invention relates to an improved barium carbonate prepared by precipitating barium carbonate on an inert core to effectively increase its sulfate scavenging utility by providing enhanced reactivity and dispersibility. This invention is especially useful in the prevention of efflorescence and scumming of bricks or ceramic tile caused by the migration of soluble sulfates during their manufacture.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: October 7, 1980
    Assignee: The Sherwin-Williams Company
    Inventors: Robert H. Kindrick, Benjamin C. Harrison
  • Composite zinc oxide coating on an inert pigment core
    Patent number: 4207377
    Abstract: This invention relates to a novel composite pigment and method for its manufacture which comprises a finely-divided inert pigment as a core which has deposited on its surface a non-photoconductive grade of zinc oxide, the weight ratio of zinc oxide ranging from about 30% to about 80% of the total weight of the composite pigment and the composite pigment characterized by a specific surface in excess of about 10 square meters/gram. In rubber compounding, the composite pigment reduces the cost of the zinc essential to produce quality products and the composite pigment because it is itself photoconductive is of utility in photoconductive end uses.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: June 10, 1980
    Assignee: The Sherwin-Williams Company
    Inventor: Robert H. Kindrick