Patents by Inventor James A. Hopson

James A. Hopson 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).

  • Isobutylene copolymers, method for making isobutylene copolymers and isobutylene copolymer products
    Patent number: 11326004
    Abstract: Isobutylene copolymer includes repeat units derived from isobutylene and one or more comonomers selected from isoprene, butadiene, cyclopentadiene, dicyclopentadiene, limonene, substituted styrenes, and C4 to C10 dienes other than isoprene, butadiene, limonene, cyclopentadiene, or dicyclopentadiene, wherein the molar ratio of isobutylene derived repeat units to the comonomer derived repeat units is from 75:1 to 1.5:1. The copolymers have a molecular weight, Mn, of from 200 to 20,000 Daltons and typically have a high double bond content and a high vinylidene double bond content when diene monomers are utilized.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: May 10, 2022
    Assignee: TPC GROUP LLC
    Inventors: Rajeev Kumar, André M. Gobin, George Pappas, James A. Hopson, Michael O. Nutt, Peggy J. Macatangay, Randall V. Redd
  • Non-random isobutylene copolymers
    Patent number: 11208511
    Abstract: Non-random isobutylene copolymer includes repeat units derived from isobutylene and one or more comonomers selected from isoprene, butadiene, cyclopentadiene, dicyclopentadiene, limonene, substituted styrenes, and C4 to C10 dienes other than isoprene, butadiene, limonene, cyclopentadiene, or dicyclopentadiene, wherein the molar ratio of isobutylene derived repeat units to the comonomer derived repeat units is from 75:1 to 1.5:1. The non-random copolymers have a molecular weight, Mn, of from 200 to 20,000 Daltons and typically have a high double bond content and a high vinylidene double bond content when diene monomers are utilized.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: December 28, 2021
    Assignee: TPC Group LLC
    Inventors: André M. Gobin, Rajeev Kumar, George Pappas, James A. Hopson, Michael O. Nutt, Peggy J. Macatangay, Randall V. Redd
  • Non-Random Isobutylene Copolymers
    Publication number: 20210301048
    Abstract: Non-random isobutylene copolymer includes repeat units derived from isobutylene and one or more comonomers selected from isoprene, butadiene, cyclopentadiene, dicyclopentadiene, limonene, substituted styrenes, and C4 to C10 dienes other than isoprene, butadiene, limonene, cyclopentadiene, or dicyclopentadiene, wherein the molar ratio of isobutylene derived repeat units to the comonomer derived repeat units is from 75:1 to 1.5:1. The non-random copolymers have a molecular weight, Mn, of from 200 to 20,000 Daltons and typically have a high double bond content and a high vinylidene double bond content when diene monomers are utilized.
    Type: Application
    Filed: October 12, 2018
    Publication date: September 30, 2021
    Inventors: André M. Gobin, Rajeev Kumar, George Pappas, James A. Hopson, Michael O. Nutt, Peggy J. Macatangay, Randall V. Redd
  • Isobutylene Copolymers, Method for Making Isobutylene Copolymers and Isobutylene Copolymer Products
    Publication number: 20200231724
    Abstract: Isobutylene copolymer includes repeat units derived from isobutylene and one or more comonomers selected from isoprene, butadiene, cyclopentadiene, dicyclopentadiene, limonene, substituted styrenes, and C4 to C10 dienes other than isoprene, butadiene, limonene, cyclopentadiene, or dicyclopentadiene, wherein the molar ratio of isobutylene derived repeat units to the comonomer derived repeat units is from 75:1 to 1.5:1. The copolymers have a molecular weight, Mn, of from 200 to 20,000 Daltons and typically have a high double bond content and a high vinylidene double bond content when diene monomers are utilized.
    Type: Application
    Filed: October 12, 2018
    Publication date: July 23, 2020
    Inventors: Rajeev Kumar, André M. Gobin, George Pappas, James A. Hopson, Michael O. Nutt, Peggy J. Macatangay, Randall V. Redd