Patents by Inventor Richard Woofter

Richard Woofter 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: 11578205
    Abstract: The disclosed technology provides thermoplastic polyurethane compositions having antimicrobial properties while still maintaining good physical properties and good non-fouling properties, methods of making the same, and articles, including medical devices, made from such compositions. The disclosed technology includes a process of making an antimicrobial polymer composition, where the process includes mixing an antimicrobial additive into a base polymer and further includes mixing in a non-fouling additive, where the antimicrobial additive is chemically held in the composition and the antimicrobial and non-fouling additives do not negatively impact each other's effectiveness.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: February 14, 2023
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Roger W. Day, Hua Zhang, Richard Woofter, Umit G. Makal, Kiara L. Smith
  • Publication number: 20220153917
    Abstract: The disclosed technology provides thermoplastic polyurethane compositions having non-leaching antimicrobial properties while still maintaining good physical properties, methods of making the same, and articles, including medical devices, made from such compositions. The disclosed technology includes a process of making an antimicrobial polymer composition, where the process includes mixing an antimicrobial additive into a polymeric material; wherein said polymeric material comprises a polymeric backbone made up of urethane linkages derived from a polyisocyanate and a polyol; and wherein said mixing occurs under conditions that result in the breaking of a minority of said urethane bonds resulting in reactive isocyanate groups; and wherein two or more of said reactive isocyanate groups react with said antimicrobial additive to covalently bond said antimicrobial additive into the polymeric backbone of said polymeric material; resulting in an antimicrobial polymer composition.
    Type: Application
    Filed: January 31, 2022
    Publication date: May 19, 2022
    Applicant: Lubrizol Advanced Materials, Inc.
    Inventors: Hua Zhang, Roger W. Day, Richard Woofter, Umit G. Makal, Kiara L. Smith
  • Patent number: 11267930
    Abstract: The disclosed technology provides thermoplastic polyurethane compositions having non-leaching antimicrobial properties while still maintaining good physical properties, methods of making the same, and articles, including medical devices, made from such compositions. The disclosed technology includes a process of making an antimicrobial polymer composition, where the process includes mixing an antimicrobial additive into a polymeric material; wherein said polymeric material comprises a polymeric backbone made up of urethane linkages derived from a polyisocyanate and a polyol; and wherein said mixing occurs under conditions that result in the breaking of a minority of said urethane bonds resulting in reactive isocyanate groups; and wherein two or more of said reactive isocyanate groups react with said antimicrobial additive to covalently bond said antimicrobial additive into the polymeric backbone of said polymeric material; resulting in an antimicrobial polymer composition.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: March 8, 2022
    Assignee: Lubrizol Advanced Materials, Inc.
    Inventors: Hua Zhang, Roger W. Day, Richard Woofter, Umit G. Makal, Kiara L. Smith
  • Publication number: 20210277231
    Abstract: The disclosed technology provides thermoplastic polyurethane compositions having antimicrobial properties while still maintaining good physical properties and good non-fouling properties, methods of making the same, and articles, including medical devices, made from such compositions. The disclosed technology includes a process of making an antimicrobial polymer composition, where the process includes mixing an antimicrobial additive into a base polymer and further includes mixing in a non-fouling additive, where the antimicrobial additive is chemically held in the composition and the antimicrobial and non-fouling additives do not negatively impact each other's effectiveness.
    Type: Application
    Filed: January 30, 2018
    Publication date: September 9, 2021
    Inventors: Roger W. Day, Hua Zhang, Richard Woofter, Umit G. Makal, Kiara L. Smith
  • Patent number: 10827757
    Abstract: A biocidally active polymer composition formed from an oligomeric or polymeric additive and a thermoplastic polyurethane polymer is disclosed. The biocidally active polymer may further include a non-fouling and/or non-thrombogenic polymer. The biocidally active polymer provides biocidally active properties, and may also provide non-fouling and/or non-thrombogenic properties. The composition is particularly useful in articles and materials for medical applications.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: November 10, 2020
    Inventors: Roger W. Day, Hua Zhang, Richard Woofter, Umit G. Makal
  • Patent number: 10829606
    Abstract: A surface-modified polymer composition formed from an oligomeric or polymeric additive and a base polymer is disclosed. The surface-modified polymer provides non-fouling and/or non-thrombogenic properties. The composition is particularly useful in articles and materials for medical applications.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: November 10, 2020
    Inventors: Roger W. Day, Hua Zhang, Umit G. Makal, Richard Woofter, Kiara Smith
  • Publication number: 20190389998
    Abstract: The disclosed technology provides thermoplastic polyurethane compositions having non-leaching antimicrobial properties while still maintaining good physical properties, methods of making the same, and articles, including medical devices, made from such compositions. The disclosed technology includes a process of making an antimicrobial polymer composition, where the process includes mixing an antimicrobial additive into a polymeric material; wherein said polymeric material comprises a polymeric backbone made up of urethane linkages derived from a polyisocyanate and a polyol; and wherein said mixing occurs under conditions that result in the breaking of a minority of said urethane bonds resulting in reactive isocyanate groups; and wherein two or more of said reactive isocyanate groups react with said antimicrobial additive to covalently bond said antimicrobial additive into the polymeric backbone of said polymeric material; resulting in an antimicrobial polymer composition.
    Type: Application
    Filed: January 30, 2018
    Publication date: December 26, 2019
    Inventors: Hua Zhang, Roger W. Day, Richard Woofter, Umit G. Makal, Kiara L. Smith
  • Publication number: 20190191703
    Abstract: A biocidally active polymer composition formed from an oligomeric or polymeric additive and a thermoplastic polyurethane polymer is disclosed. The biocidally active polymer may further include a non-fouling and/or non-thrombogenic polymer. The biocidally active polymer provides biocidally active properties, and may also provide non-fouling and/or non-thrombogenic properties. The composition is particularly useful in articles and materials for medical applications.
    Type: Application
    Filed: October 12, 2016
    Publication date: June 27, 2019
    Inventors: Roger W. Day, Hua Zhang, Richard Woofter, Umit G. Makal
  • Publication number: 20180105665
    Abstract: A surface-modified polymer composition formed from an oligomeric or polymeric additive and a base polymer is disclosed. The surface-modified polymer provides non-fouling and/or non-thrombogenic properties. The composition is particularly useful in articles and materials for medical applications.
    Type: Application
    Filed: April 22, 2016
    Publication date: April 19, 2018
    Inventors: Roger W. Day, Hua Zhang, Umit G. Makal, Richard Woofter, Kiara Smith