Patents by Inventor Steven E. Mulhall

Steven E. Mulhall 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).

  • Polymerization of alpha-methylstyrene
    Patent number: 6649716
    Abstract: A process for producing polymers of &agr;-methylstyrene uses tin IV chloride as a polymerization initiator. Use of tin IV chloride as an initiator allows polymerization to proceed without purification of the monomer prior to processing. Polymerization can be carried out at ambient temperatures with mild exotherms and good polymer yields. The process uses solvents commonly found in a plant producing &agr;-methylstyrene.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: November 18, 2003
    Assignee: Sunoco, Inc. (R&M)
    Inventors: Ronald A. Andrekanic, Jeffrey S. Salek, Steven E. Mulhall, Yuriy V. Bubnov
  • Polymerization of alpha-methylstyrene
    Publication number: 20030135000
    Abstract: A process for producing polymers of &agr;-methylstyrene uses tin IV chloride as a polymerization initiator. Use of tin IV chloride as an initiator allows polymerization to proceed without purification of the monomer prior to processing. Polymerization can be carried out at ambient temperatures with mild exotherms and good polymer yields. The process uses solvents commonly found in a plant producing &agr;-methylstyrene.
    Type: Application
    Filed: December 18, 2001
    Publication date: July 17, 2003
    Applicant: Aristech Chemical Corporation
    Inventors: Ronald A. Andrekanic, Jeffrey S. Salek, Steven E. Mulhall, Yuriy V. Bubnov
  • Bis (diallylamino) silanes
    Patent number: 5280094
    Abstract: Bis(diallylamino) silanes of the formula ##STR1## where R.sup.1 and R.sup.2 are lower alkyl or phenyl groups are copolymerized with lower olefins and desilylated to exhibit amine functionality; they are receptive to dyes.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: January 18, 1994
    Assignee: Aristech Chemical Corporation
    Inventor: Steven E. Mulhall
  • Bis(diallylamino) silanes
    Patent number: 5258533
    Abstract: Bis(diallylamino) silanes of the formula ##STR1## where R.sup.1 and R.sup.2 are lower alkyl or phenyl groups. The silanes may be homopolymerized or copolymerized with lower olefins and desilylated to exhibit amine functionality.
    Type: Grant
    Filed: February 8, 1993
    Date of Patent: November 2, 1993
    Assignee: Aristech Chemical Corporation
    Inventor: Steven E. Mulhall