Patents by Inventor Roland T. Brierre

Roland T. Brierre 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).

  • Method and apparatus for producing para-aramid pulp and pulp produced thereby
    Patent number: 5202184
    Abstract: A method for producing para-aramid pulp includes forming a liquid, actively-polymerizing solution and subjecting the solution to orienting flow which produces an optically anisotropic liquid solution with polymer chains oriented in the direction of the flow. When the solution has a viscosity sufficient to maintain the orientation of the polymer chains, the solution is incubated until it gels. The gel is cut transversely at intervals and para-aramid pulp is isolated from the gel. Para-aramid pulp produced by the process can be used similarly to pulp produced from spun fiber.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: April 13, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Roland T. Brierre, Stephan C. De La Veaux, James E. Geary, Jr., Wesley Memeger, Jr., Michael L. Trancynger
  • Method for producing para-aramid pulp
    Patent number: 5028372
    Abstract: A method for producing para-aramid pulp includes forming a liquid, actively-polymerizing solution and subjecting the solution to orienting flow which produces an optically anisotropic liquid solution with polymer chains oriented in the direction of the flow. When the solution has a viscosity sufficient to maintain the orientation of the polymer chains, the solution is incubated until it gels. The gel is cut transversely at intervals and para-aramid pulp is isolated from the gel. Para-aramid pulp produced by the process can be used similarly to pulp produced from spun fiber.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: July 2, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Roland T. Brierre, Stephan C. De La Veaux, James E. Geary, Jr., Wesley Memeger, Jr., Michael L. Trancynger