Patents by Inventor Hugh W. Lowrey

Hugh W. Lowrey 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).

  • Patent number: 4171228
    Abstract: A pigment composition for high build protective coatings material comprising special combinations of pigments selected from a first group consisting of low density pigments of smooth nodular shape having a maximum particle size of 325 microns with not less than 40% by weight retained on a 325 mesh screen and a second group consisting of pigments having a median particle diameter ranging from 0.5 to 20 microns and being shaped so that not more than 20% by weight of the particles have ratios of any two dimensions exceeding 10. The total pigment volume concentration of the coating material is not less than 40% and the total volume of both groups of pigments is not less than 75% of the total volume of pigments in the coating material with a blend of both groups containing from 20 to 95% by volume of the first group of pigments and from 5 to 80% by volume of the second group of pigments.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: October 16, 1979
    Inventor: Hugh W. Lowrey