Patents by Inventor Robert A. Bubeck

Robert A. Bubeck 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).

  • Polybenzazole fibers with ultra-high physical properties and method for making them
    Patent number: 5356584
    Abstract: A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has been reported previously.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: October 18, 1994
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Bubeck, Chieh-Chun Chau, Stephen J. Nolan, Steven Rosenberg, Mark D. Newsham, Myrna Serrano
  • Polybenzazole fiber with ultra-high physical properties
    Patent number: 5286833
    Abstract: A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has been reported previously.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: February 15, 1994
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Bubeck, Stephen J. Nolan, Chieh-Chun Chau, Steven Rosenberg, Mark D. Newsham, Myrna Serrano
  • ABS Compositions having trimodal rubber particle distributions
    Patent number: 4874815
    Abstract: A rubber modified interpolymer of a monovinylidene aromatic monomer and an ethylenically unsaturated nitrile monomer. The rubber particles of the present invention have a trimodal particle size distribution. Said particles comprise an emulsion polymerized particle and two mass polymerized particles. The compositions exhibit good impact resistance over a broad range of impact speeds.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: October 17, 1989
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Bubeck, Robert B. Clipper, David E. Henton
  • Impact styrene polymer
    Patent number: 4521569
    Abstract: Impact styrene polymers, prepared in stratified polymerizers wherein one polymerizing zone is recirculated and a solvent is employed, can have improved environmental stress crack resistance when an aliphatic hydrocarbon is utilized as solvent rather than an aromatic or cycloaliphatic solvent.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: June 4, 1985
    Assignee: The Dow Chemical Company
    Inventors: Robert A. Bubeck, Charles B. Arends