Patents by Inventor Charles Thomas Berge

Charles Thomas Berge 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).

  • Molecular weight controlled polymers by photopolymerization
    Patent number: 6316519
    Abstract: Synthesis of linear acrylic polymers and copolymers having controlled molecular weight by the photoinitiated free radical polymerization of vinyl monomers in the presence of chain transfer agents to produce polymers useful in coating compositions and the like, including printing inks.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: November 13, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Charles Thomas Berge, Vincent Desobry
  • Polymer synthesis
    Patent number: 6291620
    Abstract: Process for the synthesis of block polymers, homopolymers and copolymers of narrow polydispersity having formula (1) by contacting selected vinyl monomer(s), vinyl-terminated compound(s) and free radicals in which effective control of production of polymer is achieved by controlling the mole ratio of vinyl monomer(s), vinyl-terminated compound(s) and free radicals relative to one another; and polymers produced thereby
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: September 18, 2001
    Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific Industrial Research Organization
    Inventors: Graeme Moad, Catherine Louise Moad, Julia Krstina, Ezio Rizzardo, Thomas Robert Darling, Charles Thomas Berge
  • Allylic chain transfer agents
    Patent number: 5773543
    Abstract: A process for the free radical initiated polymerization of unsaturated species characterized by the use of compound of Formula (I) as chain transfer agents: ##STR1## wherein: X is selected from hydrogen; CN; optionally substituted aryl; COOH; COOR; C(O)NHR.sup.6 ; C(O)NR.sup.7 R.sup.8 ; and halogen;Q is selected from COOR.sup.1 ; CN; and C(O)NR.sup.7 R.sup.8 ;Y is selected from hydrogen; C.sub.1 to C.sub.6 alkyl; C.sub.1 to C.sub.6 alkyl substituted with one or more substituents selected from hydroxy, amino, C.sub.1 to C.sub.6 alkoxy, C.sub.1 to C.sub.6 alkoxycarbonyl, halogen, CN and optionally substituted aryl; C.sub.1 to C.sub.6 alkenyl; and C.sub.1 to C.sub.6 alkynyl;Z is selected from COOR.sup.2 ; CN; and optionally substituted aryl;R.sup.3 and R.sup.4 are the same or different and are selected from hydrogen C.sub.1 to C.sub.4 alkyl and halogen; or R.sup.3 and R.sup.
    Type: Grant
    Filed: August 1, 1996
    Date of Patent: June 30, 1998
    Assignee: Commonwealth Scientific and Industrial Research Organisation
    Inventors: Ezio Rizzardo, San Hoa Thang, Graeme Moad, Charles Thomas Berge