Patents by Inventor Mohammad J. El-Hibri

Mohammad J. El-Hibri 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).

  • Plumbing articles from poly(aryl ether sulfones)
    Patent number: 6329493
    Abstract: Plumbing articles made from a thermoplastic resin comprising a poly(biphenyl ether sulfone) and a poly(aryl ether sulfone) comprising bisphenol A residues.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: December 11, 2001
    Assignee: BP Corporation North America Inc.
    Inventors: Mohammad J. El-Hibri, Barry L. Dickinson
  • Process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers)
    Patent number: 5159028
    Abstract: The invention describes a novel process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers). The process is comprised of the steps:(a) the reaction of a dihydroxy-terminated poly(aryl ether) oligomer with a high molecular weight polycarbonate, or a high molecular weight polyarylate, or a high molecular weight poly(arylate-carbonate) to yield a block copolymer; followed by(b) the coupling of the material obtained in step (a) to the required molecular weight, using a diaryl ester of carbonic acid or of a dicarboxylic acid.Both steps are performed in the presence of a catalyst. The copolymerizations can be run in bulk under vacuum in a single or twin screw extruder. Using the above conditions high molecular weight, high quality block copolymers having a combination of excellent properties are obtained in a matter of minutes.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: October 27, 1992
    Assignee: Amoco Corporation
    Inventors: Markus Matzner, George T. Kwiatkowski, Robert A. Clendinning, Selvaraj Savariar, Mohammad J. El-Hibri, Charles N. Merriam, Robert J. Cotter
  • Flame retardant blends of polysulfone and polyalkylene phthalate
    Patent number: 5151462
    Abstract: This invention relates to flame retardant blends of polysulfone, with polyalkylene phthalate. The present blends are flame retardant, even at thin part thickness.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: September 29, 1992
    Assignee: Amoco Corporation
    Inventors: Mohammad J. El-Hibri, Gregory S. Jack, William E. Kelly, Sanjay R. Patel
  • Process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers)
    Patent number: 5077351
    Abstract: The invention describes a novel process for the preparation of polycarbonate and/or polyarylate block copolymers with poly(aryl ethers). The process is comprised of the steps:(a) the reaction of a dihydroxy-terminated poly(aryl ether) oligomer with a high molecular weight polycarbonate, or a high molecular weight polyarylate, or a high molecular weight poly(arylate-carbonate) to yield a block copolymer; followed by(b) the coupling of the material obtained in step (a) to the required molecular weight, using a diaryl ester of carbonic acid or of a dicarboxylic acid.Both steps are performed in the presence of a catalyst. The copolymerizations can be run in bulk under vacuum in a single or twin screw extruder. Using the above conditions high molecular weight, high quality block copolymers having a combination of excellent properties are obtained in a matter of minutes.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: December 31, 1991
    Assignee: Amoco Corporation
    Inventors: Markus Matzner, George T. Kwiatkowski, Robert A. Clendinning, Selvaraj Savariar, Mohammad J. El-Hibri, Charles N. Merriam, Robert J. Cotter