Patents by Inventor Ray Leonard Hillard

Ray Leonard Hillard 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).

  • Light and heat stabilizers for polyolefins
    Patent number: 4064102
    Abstract: Compounds of the formula: ##STR1## wherein R is hydrogen or alkyl (C.sub.1 -C.sub.8), R' is hydrogen, hydroxyl or lower alkoxy (C.sub.1 -C.sub.8); R" is alkyl (C.sub.1 -C.sub.20), alkylene (C.sub.2 -C.sub.12), cycloalkyl, wherein the alicyclic ring contains 5- or 6-carbon atoms, cycloalkylene, wherein the alicyclic ring may contain lower alkyl substituents, alkenyl (C.sub.3 -C.sub.20), arylene or aralkylene; n is an integer from 1 to 4, are useful for stabilizing polyolefin polymer against photo and thermal degradation.
    Type: Grant
    Filed: March 18, 1976
    Date of Patent: December 20, 1977
    Assignee: American Cyanamid Company
    Inventors: Ray Leonard Hillard, William Baptist Hardy
  • Method for the preparation of mono- or poly [dialkyl or dicycloalkylphosphonylmethyl] aromatic carbocyclic compounds
    Patent number: 4061681
    Abstract: Mono- and poly [dialkyl or dicycloalkylphosphonylmethyl] aromatic carbocyclic compounds are prepared by reacting an appropriately substituted secondary phosphine with formaldehyde, reacting the resultant dialkyl or dicyclohydroxymethylphosphine with an appropriately substituted halomethyl aromatic compound and oxidizing the resultant secondary phosphine.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: December 6, 1977
    Assignee: American Cyanamid Company
    Inventors: Ray Leonard Hillard, Norma Ann Weston
  • Process for tris(aralkyl)phosphines
    Patent number: 4053518
    Abstract: In a solution that is free of bases and free of oxygen and which contains at least four molar proportions of the reactant tris(hydroxymethyl)phosphine for every three molar proportions of an aralkyl halide reactant, the following reaction produces tris(aralkyl)phosphine product:3(Ar-CH.sub.2 X) + 4P(CH.sub.2 OH).sub.3 .fwdarw. (Ar-CH.sub.2).sub.3 P + 3P.sup.+ (CH.sub.2 OH).sub.4 X.sup.-after separation of the phosphine product, the phosphonium salt by-products can be converted to tris(hydroxymethyl)phosphine by the addition of a base.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: October 11, 1977
    Assignee: American Cyanamid Company
    Inventors: Norma Ann Weston, Ray Leonard Hillard