Patents Assigned to Ortec, Inc.
  • Conductive paint compositions for forming conductive coatings on substrates
    Patent number: 7828994
    Abstract: A conductive paint composition includes a solvent, metal powder, a rheology control agent and a water-dispersible polyurethane resin therein. The water-dispersible polyurethane resin has at least one aromatic group and a repeat unit of ether therein.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: November 9, 2010
    Assignees: Ortec, Inc., Panaxem Co., Ltd.
    Inventors: Kim Hyun Don, Chung Hae Ryong, Song Mi Kyung, Bae Chang Seok, Joung Young Gak, Hyun Myung Eok
  • Process for reducing discoloration of cellulosic fibers, treated at a high temperature with a solution of a polycarboxylic acid and boric acid or borate
    Patent number: 5199953
    Abstract: A process for reducing discoloration of fibrous cellulosic material, treated at temperatures above about 175.degree. C. with a treating solution of a polycarboxylic acid and a phosphate salt curing catalyst, comprises adding to the treating solution an inorganic boron-oxygen compound.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: April 6, 1993
    Assignee: Ortec, Inc.
    Inventors: Kwok-Wing Fung, Kam H. Wong, David L. Brotherton
  • Process for the oxidation of a tetrahydrophthalic acid
    Patent number: 5157152
    Abstract: A process for oxidation of a tetrahydro compound of the formula ##STR1## wherein R and R' independently are H, alkyl, aryl or halo, to a glycol of the formula ##STR2## comprises treating the tetrahydro compound with hydrogen peroxide at an elevated temperature under reflux conditions in the absence of a catalyst. The thus-formed glycol can be further oxidized to a butanetetracarboxylic acid of the formula ##STR3## with hydrogen peroxide in the presence of a catalyst selected from the group consisting of a manganese salt, an iron salt, a chromium salt, a cerium salt, a persulfate, a perborate, a silicate, tungstic acid or an ammonium or alkali metal salt or heteropolyacid thereof, or molybdic acid or an ammonium or alkali metal salt or heteropolyacid thereof.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: October 20, 1992
    Assignee: Ortec, Inc.
    Inventors: David L. Brotherton, Kwok W. Fung, Kam H. Wong
  • Process for the oxidation of a tetrahydrophthalic acid
    Patent number: 5047582
    Abstract: A process for oxidation of a tetrahydro compound of the formula ##STR1## wherein R and R' independently are H, alkyl, aryl or halo, to a glycol of the formula ##STR2## comprises treating the tetrahydro compound with hydrogen peroxide at an elevated temperature in the absence of a catalyst.The thus-formed glycol can be further oxidized in a butanetetracarboxylic acid of the formula ##STR3## with hydrogen peroxide in the presence of a catalyst selected from the group consisting of a manganese salt, an iron salt, a chromium salt, a cerium salt, a persulfate, a perborate, a silicate, tungstic acid or an ammonium or alkali metal salt or heteropolyacid thereof, or molybdic acid or an ammonium or alkali metal salt or heteropolyacid thereof.
    Type: Grant
    Filed: October 2, 1989
    Date of Patent: September 10, 1991
    Assignee: Ortec, Inc.
    Inventors: David L. Brotherton, Kwok W. Fung