Patents by Inventor Marvin J. Hurwitz

Marvin J. Hurwitz 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).

  • Method of purifying condensate waters for steam regenerating equipment
    Patent number: 4886606
    Abstract: Strong base ion exchange resins derived from crosslinked vinylbvenzyl chloride polymers are particularly suitable for purifying condensate waters for steam regenerating equipment. Preferred embodiments utilize gellular anion exchange resins to remove corrosion products from boiler condensate waters.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: December 12, 1989
    Assignee: Rohm and Haas Company
    Inventors: David H. Clemens, Marvin J. Hurwitz, Robert W. Walker
  • Permanent dental restorative material
    Patent number: 4433958
    Abstract: Wear-resistant, high compressive strength permanent dental restorations are prepared from novel compositions comprising (a) a liquid monomer system comprised of one or more monoethylenically unsaturated monomers and one or more polyethylenically unsaturated monomers, (b) a solid particulate system insoluble in the liquid monomer system (a) comprised of a mixture of both organic and inorganic particulate substances, and (c) a free radical initiator system.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: February 28, 1984
    Assignee: Rohm and Haas Company
    Inventors: Robert P. Fellman, Marvin J. Hurwitz, Robert M. Myers, Gerald F. Slack
  • Aminated crosslinked copolymers of bis(chloromethyl) styrene which exhibit improved anion exchange properties
    Patent number: 4093567
    Abstract: This invention relates to certain novel anion exchange resins and the method of making them. It relates more particularly to aminated cross-linked polymers of bis(chloromethyl(styrene which exhibit improved anion exchange properties, and to the method of preparing the same.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: June 6, 1978
    Assignee: Rohm and Haas Company
    Inventors: Marvin J. Hurwitz, Noyes L. Avery
  • Removal of antimony from industrial streams
    Patent number: 4046688
    Abstract: A novel process is described for the removal and/or recovery of dissolved antimony from an industrial stream, such as a waste stream, using a strong acid and/or a strong base ion exchange resin, in the hydrogen and hydroxyl forms respectively, to adsorb the antimony.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: September 6, 1977
    Assignee: Rohm and Haas Company
    Inventors: Virginia L. Cunningham, James S. Clovis, Marvin J. Hurwitz