Patents by Inventor Abdulgaffar Vadgama

Abdulgaffar Vadgama 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 process
    Patent number: 6977283
    Abstract: The present invention relates to a process for polymerizing monomer and comonomer(s) utilizing a bulky ligand transition metal metallocene-type catalyst or catalyst system, where the process is operated in the absence of or with a low amount of any of the isomers of the comonomer(s). The level of these isomers in the process of the invention are eliminated or maintained below a threshold level. It has been discovered that removal of certain isomers of the comonomer used in a polymerization process using metallocene-type catalysts results in an improved process.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: December 20, 2005
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: John R. Shutt, Kevin R. Squire, Abdulgaffar Vadgama