Patents by Inventor Quintin Paul Ward Costin

Quintin Paul Ward Costin 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).

  • Process for the production of polymeric compositions useful as oil modifiers
    Patent number: 9139794
    Abstract: Provided are processes for making polymer compositions, especially those with reduced or no gel formation in lubricating oils as identified by rheological and visual gel tests and which are useful as viscosity modifiers. The processes described herein aim to achieve this objective by adjusting the concentrations of the hydrogen feed(s) in the first and/or second polymerization reaction zones, preferably such that (a) the hydrogen feed concentration in the first polymerization reaction zone is 0.0-1.0 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, ?-olefin comonomer, and solvent into the first polymerization reaction zone, and/or (b) the hydrogen feed concentration in the second polymerization reaction zone is 0.0-0.5 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, ?-olefin comonomer, and solvent into the second polymerization reaction zone.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: September 22, 2015
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Rainer Kolb, Phillip T. Matsunaga, Periagaram S. Ravishankar, Lisa B. Stefaniak, Quintin Paul Ward Costin
  • Process for the Production of Polymeric Compositions Useful as Oil Modifiers
    Publication number: 20130203641
    Abstract: Provided are processes for making polymer compositions, especially those with reduced or no gel formation in lubricating oils as identified by rheological and visual gel tests and which are useful as viscosity modifiers. The processes described herein aim to achieve this objective by adjusting the concentrations of the hydrogen feed(s) in the first and/or second polymerization reaction zones, preferably such that (a) the hydrogen feed concentration in the first polymerization reaction zone is 0.0-1.0 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, ?-olefin comonomer, and solvent into the first polymerization reaction zone, and/or (b) the hydrogen feed concentration in the second polymerization reaction zone is 0.0-0.5 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, ?-olefin comonomer, and solvent into the second polymerization reaction zone.
    Type: Application
    Filed: February 3, 2012
    Publication date: August 8, 2013
    Inventors: Rainer Kolb, Phillip T. Matsunaga, Periagaram S. Ravishankar, Lisa B. Stefaniak, Quintin Paul Ward Costin