Patents by Inventor Philip Dimitrov

Philip Dimitrov 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).

  • Method for forming highly reactive olefin functional polymers
    Patent number: 10174138
    Abstract: An improved process for the preparation of polybutene having an exo-olefin content of at least 50 mol. % by the polymerization of iso-butene, or a C4 feed containing iso-butene and other C4 olefins using (i) a Lewis acid.Lewis base catalyst complex and an alkyl halide initiator, in a substantially or completely apolar polymerization medium, in the presence of a hindered alcohol or alkoxyaluminum dichloride. In the above polymerization reaction, it has been found that a hindered alcohol or hindered alkoxyaluminum dichloride will function as an “exo enhancer” resulting in high isobutene conversion and the production of a polybutene product having a high terminal vinylidene content, while maintaining a target molecular weight.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: January 8, 2019
    Assignees: University of Massachusetts, Infineum International Limited
    Inventors: Rudolf Faust, Jacob Emert, Philip Dimitrov, Peter Hobin, Kyle Nesti
  • Polymerization Initiating System And Method To Produce Highly Reactive Olefin Functional Polymers
    Publication number: 20190002607
    Abstract: A method for producing highly reactive olefin polymers wherein at least 50 mol. % of the polymer chains have terminal double bonds, from an impurity-containing isobutylene or a mixed C4 hydrocarbyl feedstock containing isobutylene in which the water content of the feedstock is controlled to be at least equal to the content of polar impurities in the feedstock, and less than the concentration at which the water causes a decrease in vinylidene end-group selectivity.
    Type: Application
    Filed: June 28, 2017
    Publication date: January 3, 2019
    Inventors: Philip Dimitrov, Richard J. Severt, Thomas Skourlis, Jeremy Weber, Jacob Emert, Rudolf Faust
  • Polymerization initiating system and method to produce highly reactive olefin functional polymers
    Patent number: 10167352
    Abstract: A method for producing highly reactive olefin polymers wherein at least 50 mol. % of the polymer chains have terminal double bonds, from an impurity-containing isobutylene or a mixed C4 hydrocarbyl feedstock containing isobutylene in which the water content of the feedstock is controlled to be at least equal to the content of polar impurities in the feedstock, and less than the concentration at which the water causes a decrease in vinylidene end-group selectivity.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: January 1, 2019
    Assignees: University of Massachusetts, Infineum International Limited
    Inventors: Philip Dimitrov, Richard J. Severt, Thomas Skourlis, Jeremy Weber, Jacob Emert, Rudolf Faust
  • Polymerization initiating system and method to produce highly reactive olefin functional polymers
    Patent number: 10047174
    Abstract: A method for producing highly reactive olefin polymers wherein at least 50 mol. % of the polymer chains have terminal double bonds, from an isobutylene or a mixed C4 hydrocarbyl feedstock containing isobutylene. To achieve a viable process, water is added to the catalyst stream or the feedstock in the overall range of 0.05 mM to less than 5 mM per liter of feedstock.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: August 14, 2018
    Assignee: INFINEUM INTERNATIONAL LIMITED
    Inventors: Philip Dimitrov, Richard J. Severt, Thomas Skourlis, Jeremy Weber, Jacob Emert
  • Polymerization initiating system and method to produce highly reactive olefin functional polymers
    Patent number: 9034998
    Abstract: A method for producing highly reactive olefin polymers wherein at least 50 mol. % of the polymer chains have terminal double bonds, and a novel polymerization initiating system for accomplishing same.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: May 19, 2015
    Assignees: University of Massachusetts, Infineum Internatonal Limited
    Inventors: Rudolf Faust, Philip Dimitrov, Rajeev Kumar, Jacob Emert, Jun Hua
  • POLYMERIZATION INITIATING SYSTEM AND METHOD TO PRODUCE HIGHLY REACTIVE OLEFIN FUNCTIONAL POLYMERS
    Publication number: 20130158217
    Abstract: A method for producing highly reactive olefin polymers wherein at least 50 mol. % of the polymer chains have terminal double bonds, and a novel polymerization initiating system for accomplishing same.
    Type: Application
    Filed: December 16, 2011
    Publication date: June 20, 2013
    Applicants: INFINEUM INTERNATIONAL LIMITED, UNIVERSITY OF MASSACHUSETTS
    Inventors: Rudolf Faust, Philip Dimitrov, Rajeev Kumar, Jacob Emert, Jun Hua