Patents by Inventor Robert B. Sandor

Robert B. Sandor 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).

  • Sheets formed from polyesters including isosorbide
    Patent number: 6025061
    Abstract: A sheet made of a polyester which includes monomer units of terephthaloyl moieties, ethylene glycol moieties and isosorbide moieties is described. The polyester has an inherent viscosity of at least about 0.35 dL/g when measured as a 1% (weight/volume) solution of said polyester in o-chlorophenol at a temperature of 25.degree. C. The present invention also relates to a method of making the polyester sheet described above and a method of thermoforming the sheet into articles.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: February 15, 2000
    Assignee: HNA Holdings, Inc.
    Inventors: Garo Khanarian, Larry F. Charbonneau, Robert E. Johnson, Helmut B. Witteler, Russel G. Lee, Robert B. Sandor, Gregory V. Nelson
  • Composite yarns having high cut resistance for severe service
    Patent number: 5597649
    Abstract: Composite yarns having exceptional cut resistance are made by combining at least two different kinds of fiber, as follows: (a) a high modulus fiber having a modulus greater than about 200 gpd as measured by ASTM Test Method D-3822; and (b) a particle-filled fiber, which is made from a semi-crystalline polymer, such as poly(ethylene terephthalate), and hard particles having a Mohs Hardness Value greater than about 3.
    Type: Grant
    Filed: November 16, 1995
    Date of Patent: January 28, 1997
    Assignee: Hoechst Celanese Corp.
    Inventors: Robert B. Sandor, Herman L. LaNieve, III, Robert E. Roschen
  • Extrusion blow molding of thermotropic liquid crystalline polymers
    Patent number: 5336464
    Abstract: An extrusion blow molding process for a heat-treated, liquid crystalline polymer is provided. By the process, molten polymer having improved melt strength, is vertically extruded downward into space through a parison-forming, annular gap. Sag resistant parisons are formed. Beneficially, the parisons may be formed periodically. Advantageously, large-sized parts or structures may be produced.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: August 9, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Cheryl F. Corallo, Robert B. Sandor, Ralph S. Blake
  • Extrusion blow molding of filled liquid crystal polymers
    Patent number: 5306461
    Abstract: An extrusion blow molding process for a filled, liquid crystalline polymer is provided. By the process, molten polymer having improved melt strength, is vertically extruded downward into space through a parison-forming, annular gap. Sag resistant parisons are formed. Beneficially, the parisons may be formed periodically. Advantageously, large-sized parts or structures may be produced.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: April 26, 1994
    Assignee: Hoechst Celanese Corporation
    Inventors: Cheryl F. Corallo, Robert B. Sandor, Ralph S. Blake, Derrick B. McKie
  • Polybenzimidazole solutions
    Patent number: 5066697
    Abstract: A solution polybenzimidazole which is resistant to phase separation contains: a polybenzimidazole; a solvent capable of dissolving the polybenzimidazole; and a minor amount of ammonium acetate.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: November 19, 1991
    Assignee: Hoechst Celanese Corporation
    Inventors: Robert B. Sandor, Theodore S. Thornburg