Patents Examined by Willis, Jr. Prince
  • Method for permanent mold casting with permanent mold casting powdery mold releasing agent
    Patent number: 5279749
    Abstract: A permanent mold casting powdery mold releasing agent according to this invention consists of a granulated or powdery mixture of a lubricant, an organic polymer and a metal soap; wherein the lubricant is coated with the organic polymer or the metal soap. Therefore, the mold releasing agent allows productions of castings of high quality, in a parmanent mold casting work, with good workability and without worsening environmental situations.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: January 18, 1994
    Assignee: Hanano Commercial Co., Ltd.
    Inventor: Takashi Hanano
  • Multifunctional viscosity index improver containing units from unsaturated chlorides and aromatic amines
    Patent number: 5135671
    Abstract: Multifunctional viscosity index improvers for lubricating oils containing olefin copolymers which have pendant groups derived from vinylbenzyl chloride and N-phenyl-p-phenylene diamine.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: August 4, 1992
    Assignee: Texaco Inc.
    Inventors: Maria M. Kapuscinski, Theodore E. Nalesnik, Robert T. Biggs, Raymond C. Schlicht
  • Borated hydroxyalkyl esters of dithiocarbamic acids as multifunctional additives for lubricant compositions
    Patent number: 5126063
    Abstract: Lubricating oil and grease compositions contain borated hydroxyalkyl esters of amine or metal salts of diorganodithiocarbamic acid, such as N,N'-di-(2-ethylhexyl) dithiocarbamic acid, and hydrocarbylene oxie, such as propylene oxide, as antioxidant, load-carrying and friction modifying additives.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: June 30, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Angeline B. Cardis, Liehpao O. Farng, Abraham O. M. Okorodudu, Andrew G. Horodysky
  • Inhibition of deposition in aqueous systems
    Patent number: 5122278
    Abstract: A method for treating an aqueous system is disclosed which comprises incorporating therein a water soluble organic sulphonate copolymer and an optionally N-substituted water soluble copolymer of acrylamide or methacrylamide and a copolymerizable monomer.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: June 16, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Stuart W. Longworth, Brian Greaves, John J. Bennison