Patents by Inventor Carlos U. De Garcia

Carlos U. De Garcia 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).

  • Patent number: 8816027
    Abstract: This invention relates to a homogenous process for making a vinyl terminated propylene polymer, wherein the process comprises: contacting, propylene, under polymerization conditions, with a catalyst system comprising an activator and at least one metallocene compound, where the metallocene compound is represented by the formula: where: M is hafnium or zirconium; each X is a group bound to M as described herein; each R1 and R2 is, independently, a C1 to C10 alkyl group; each R3 is, independently, hydrogen; each R4, R5, and R6, is, independently, hydrogen or a substituted or unsubstituted hydrocarbyl group, a heteroatom or heteroatom containing group; T is a bridging group as described herein; and further provided that any of adjacent R4, R5, and R6 groups may form a fused ring or multicenter fused ring system where the rings may be aromatic, partially saturated or saturated, wherein the activator comprises a non-coordinating anion.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: August 26, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Donna J. Crowther, Patrick Brant, Carlos U. De Garcia, Jacqueline A. Lovell