Patents by Inventor Ralph Lawrence Walker

Ralph Lawrence Walker 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).

  • Coating compositions with magnesium phosphate pigment
    Patent number: 3960611
    Abstract: Pigments containing a magnesium phosphate as a component of an active pigment to be used in an anti-corrosive paint have been found to be especially useful when the pigment is present in a pigment volume concentration of from 20 to 30%. It has also been discovered that the proportion of magnesium phosphate in the pigment may be relatively low levels while the composition maintains a satisfactory degree of corrosion inhibition.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: June 1, 1976
    Assignee: Albright & Wilson Limited
    Inventors: Ralph Lawrence Walker, John Richard Stockdale