Patents Assigned to Interox America
  • Process for the delignification of a chemical paper pulp with organic peroxy acid
    Patent number: 5431781
    Abstract: Process for the delignification of a chemical paper pulp by means of an organic peroxy acid, according to which the raw pulp arising from the cooking operation is treated with an aqueous solution of this organic peroxy acid, whose hydrogen peroxide content does not exceed 20% of the weight of the peroxy acid.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: July 11, 1995
    Assignee: Interox America
    Inventor: Patricia B. Walsh
  • Process for the colour stripping and bleaching of coloured waste paper
    Patent number: 5266158
    Abstract: Process for color stripping and bleaching of colored waste paper by treatment by means of monoperoxysulphuric acid or of one of its salts, according to which the treatment is performed in the presence of a halide ion.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: November 30, 1993
    Assignee: Interox America
    Inventors: Roy T. Hill, Patricia B. Walsh
  • Reduction of nitrosamine formation
    Patent number: 5023376
    Abstract: Reaction of amine-containing substrates with hydrogen peroxide can suffer from the problems of in situ generation of nitrosamines, which are allegedly carcinogens, as impurities and impaired product formation, especially in the presence of transition metals.The problems can be ameliorated by employing a selected range of alkyleneaminopoly(methylenephosphonic acid) compounds such as cyclohexane-1,2-diaminotetra(methylenephosphonic acid).
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: June 11, 1991
    Assignee: Interox America
    Inventors: Noel S. Shehad, Laurie L. Dussack, Dirk van Hemelrijk
  • Process for the assembly of wooden components and assembly of wooden components
    Patent number: 4735851
    Abstract: Process for the assembly of wooden components in which the wooden components are coated with a thermosetting resin containing formaldehyde and the resin-coated components are then treated with a peroxide and are then pressed together while heat is applied. Assembly of wooden components obtained by said process.
    Type: Grant
    Filed: July 15, 1986
    Date of Patent: April 5, 1988
    Assignee: Interox America
    Inventors: Michael G. Dodson, John R. Presley
  • Process for the assembly of wooden components and assembly of wooden components
    Patent number: 4620892
    Abstract: Process for the assembly of wooden components in which the wooden components are coated with a thermosetting resin containing formaldehyde and the resin-coated components are then treated with a peroxide and are then pressed together while heat is applied. Assembly of wooden components obtained by said process.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: November 4, 1986
    Assignee: Interox America
    Inventors: Michael G. Dodson, John R. Presley
  • Wastewater treatment
    Patent number: 4569769
    Abstract: Aqueous alkaline sulfidic waste effluents are often subjected to air oxidation processes that for economic sizing oxidize the sulfides only to thiosulfates. Thiosulfates are still immediate oxygen demanders and thus their concentration in the effluent must normally be reduced to below a threshold level before the effluent can be discharged. The effectiveness of hydrogen peroxide for this purpose can be significantly improved both as to rate of reaction and extent of removal by employing a copper catalyst in solution.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: February 11, 1986
    Assignee: Interox America
    Inventors: John R. Walton, Jeffrey A. Rutz