Patents by Inventor Ralph L. David

Ralph L. David 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).

  • Functionalized Polymers Using Protected Thiols
    Publication number: 20130190504
    Abstract: A process for the preparation of functional molecules using the thiol-ene coupling reaction and a process for the preparation of protected functional thiols, specifically thioesters is provided. The methods may be used to make functional polymers and other molecules. The method of making a functionalized polymer using a thiol-ene reaction comprises: providing a functionalized thioester having the following formula: wherein R is a functional group and COR? is a protecting group; cleaving the functionalized thioester, forming a functional thiol and an acyl group; providing a polymer having a pendant vinyl group; and reacting the polymer with the functional thiol whereby a functionalized polymer is formed, wherein the functional thiol is not isolated prior to reacting with the polymer.
    Type: Application
    Filed: October 1, 2012
    Publication date: July 25, 2013
    Inventors: Ralph L. DAVID, Julia A. KORNFIELD
  • Functionalized polymers using protected thiols
    Patent number: 8283438
    Abstract: A process for the preparation of functional molecules using the thiol-ene coupling reaction and a process for the preparation of protected functional thiols, specifically thioesters is provided. The methods may be used to make functional polymers and other molecules. The method of making a functionalized polymer using a thiol-ene reaction comprises: providing a functionalized thioester having the following formula: wherein R is a functional group and COR? is a protecting group; cleaving the functionalized thioester, forming a functional thiol and an acyl group; providing a polymer having a pendant vinyl group; and reacting the polymer with the functional thiol whereby a functionalized polymer is formed, wherein the functional thiol is not isolated prior to reacting with the polymer.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: October 9, 2012
    Assignee: California Institute of Technology
    Inventors: Ralph L. David, Julia A. Kornfield
  • Functionalized Polymers Using Protected Thiols
    Publication number: 20110077407
    Abstract: A process for the preparation of functional molecules using the thiol-ene coupling reaction and a process for the preparation of protected functional thiols, specifically thioesters is provided. The methods may be used to make functional polymers and other molecules. The method of making a functionalized polymer using a thiol-ene reaction comprises: providing a functionalized thioester having the following formula: wherein R is a functional group and COR? is a protecting group; cleaving the functionalized thioester, forming a functional thiol and an acyl group; providing a polymer having a pendant vinyl group; and reacting the polymer with the functional thiol whereby a functionalized polymer is formed, wherein the functional thiol is not isolated prior to reacting with the polymer.
    Type: Application
    Filed: December 6, 2010
    Publication date: March 31, 2011
    Inventors: Ralph L. David, Julia A. Kornfield
  • Functionalized polymers using protected thiols
    Patent number: 7847019
    Abstract: A process for the preparation of functional molecules using the thiol-ene coupling reaction and a process for the preparation of protected functional thiols, specifically thioesters is provided. The methods may be used to make functional polymers and other molecules. The method of making a functionalized polymer using a thiol-ene reaction comprises: providing a functionalized thioester having the following formula: wherein R is a functional group and COR? is a protecting group; cleaving the functionalized thioester, forming a functional thiol and an acyl group; providing a polymer having a pendant vinyl group; and reacting the polymer with the functional thiol whereby a functionalized polymer is formed, wherein the functional thiol is not isolated prior to reacting with the polymer.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: December 7, 2010
    Assignee: California Institute of Technology
    Inventors: Ralph L. David, Julia A. Kornfield
  • Functionalized Polymers Using Protected Thiols
    Publication number: 20090176941
    Abstract: A process for the preparation of functional molecules using the thiol-ene coupling reaction and a process for the preparation of protected functional thiols, specifically thioesters is provided. The methods may be used to make functional polymers and other molecules. The method of making a functionalized polymer using a thiol-ene reaction comprises: providing a functionalized thioester having the following formula: wherein R is a functional group and COR? is a protecting group; cleaving the functionalized thioester, forming a functional thiol and an acyl group; providing a polymer having a pendant vinyl group; and reacting the polymer with the functional thiol whereby a functionalized polymer is formed, wherein the functional thiol is not isolated prior to reacting with the polymer.
    Type: Application
    Filed: October 15, 2008
    Publication date: July 9, 2009
    Inventors: Ralph L. David, Julia A. Kornfield