Patents by Inventor Stephen D. Cummings

Stephen D. Cummings 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).

  • Flexibilizing capped prepolymers
    Patent number: 11807708
    Abstract: A flexibilizing capped prepolymer can include a reaction product of reaction mixture including a polyisocyanate and an isocyanate-reactive component at an equivalent ratio of polyisocyanate equivalents to isocyanate-reactive component equivalents of from 1.4:1 to 2.1:1. The isocyanate-reactive component can include a polyol component and a branching agent component. The branching agent component can include a monoglyceride, a diglyceride, a triglyceride, or a combination thereof having a number average functionality of from 3 to 6 NCO-reactive functional groups. The reaction product is terminated with a capping agent to form the flexibilizing capped prepolymer.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: November 7, 2023
    Assignee: Covestro LLC
    Inventors: Stephen D. Cummings, Matthew Stewart, Sharlene A. Lewis, Rick L. Adkins, Jack R. Reese
  • TRANSITION TO TRANSLUCENT SUTURES
    Publication number: 20210308319
    Abstract: An absorbable medical article comprising: an absorbable polymeric substrate; and an absorbable composition disposed on at least a portion of a surface of the substrate, wherein the absorbable composition comprises: (i) at least one absorbable coating polymer distinct from the substrate and (ii) a colorant that is miscible with the absorbable coating polymer.
    Type: Application
    Filed: August 1, 2019
    Publication date: October 7, 2021
    Applicant: University of Pittsburgh - Of the Commonwealth System of Higher Education
    Inventors: Eric J. Beckman, Joseph P. Rubin, Stephen D. Cummings
  • FLEXIBILIZING CAPPED PREPOLYMERS
    Publication number: 20210253778
    Abstract: A flexibilizing capped prepolymer can include a reaction product of reaction mixture including a polyisocyanate and an isocyanate-reactive component at an equivalent ratio of polyisocyanate equivalents to isocyanate-reactive component equivalents of from 1.4:1 to 2.1:1. The isocyanate-reactive component can include a polyol component and a branching agent component. The branching agent component can include a monoglyceride, a diglyceride, a triglyceride, or a combination thereof having a number average functionality of from 3 to 6 NCO-reactive functional groups. The reaction product is terminated with a capping agent to form the flexibilizing capped prepolymer.
    Type: Application
    Filed: February 18, 2021
    Publication date: August 19, 2021
    Inventors: Stephen D. Cummings, Matthew Stewart, Sharlene A. Lewis, Rick L. Adkins, Jack R. Reese