Patents by Inventor Birgitte M. L. C. Van de Vliet

Birgitte M. L. C. Van de Vliet 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).

  • Linear block copolymers process for their preparation and adhesive composition containing them
    Patent number: 5554697
    Abstract: Block copolymers of the structure A-B-C-D of improved processability derived from a vinyl aromatic monomer and a conjugated diene, having a total bound vinyl aromatic content in the range of from 10 to 40 wt %, wherein the conjugated diene has been polymerized in a 1,2 or 3,4 addition in an amount of from 1 to 20% of the total bound conjugated diene, and wherein A represents a predominantly poly(vinylaromatic)block, B represents a predominantly poly(conjugated diene), D represents a predominantly poly(vinylaromatic)block, and C represents a tapered block of the conjugated diene occurring in the block B and a the vinyl aromatic occuring in the block D, wherein the tapering in block C shows an increasing content of vinyl aromatic monomer in the direction to block D, wherein the weight ratio of the conjugated diene occurring in block B and the conjugated diene occurring in block C is in the range of from 5:5 to 9:1, and wherein the total apparent molecular weight of which is in the range of from 130,000 to 300,0
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: September 10, 1996
    Assignee: Shell Oil Company
    Inventors: Menno A. Van Dijk, Jacqueline M. Veurink, Birgitte M. L. C. Van De Vliet, Jeroen Van Westrenen
  • Linear block copolymers, process for their preparation and adhesive composition containing them
    Patent number: 5510423
    Abstract: Block copolymers of the structure A-B-C-D of improved processability derived from a vinyl aromatic monomer and a conjugated diene, having a total bound vinyl aromatic content in the range of from 10 to 40 wt.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: April 23, 1996
    Assignee: Shell Oil Company
    Inventors: Menno A. Van Dijk, Jacqueline M. Veurink, Birgitte M. L. C. Van de Vliet, Jeroen Van Westrenen