Patents by Inventor Thomas A. J. Schweiger

Thomas A. J. Schweiger 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).

  • Azeotrope mixtures with perfluorobutylethylene
    Patent number: 6793840
    Abstract: An azeotropic mixture of perfluorobutylethylene and at least one of the group consisting of bromochloromethane, cyclopentane, cis-1,2 dichloroethylene, trans-1,2 dichloroethylene and dichloromethane useful for cleaning agents, blowing agents and certain of which are suitable for flash spinning of polyolefins to make plexifilamentary fibers.
    Type: Grant
    Filed: September 4, 2003
    Date of Patent: September 21, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hyunkook Shin, Chien-Ping Chai Kao, Thomas A. J. Schweiger
  • Azeotrope mixtures with perfluorobutylethylene
    Publication number: 20040051074
    Abstract: An azeotropic mixture of perfluorobutylethylene and at least one of the group consisting of bromochloromethane, cyclopentane, cis-1,2 dichloroethylene, trans-1,2 dichloroethylene and dichloromethane useful for cleaning agents, blowing agents and certain of which are suitable for flash spinning of polyolefins to make plexifilamentary fibers.
    Type: Application
    Filed: September 4, 2003
    Publication date: March 18, 2004
    Inventors: Hyunkook Shin, Chien-Ping Chai Kao, Thomas A.J. Schweiger
  • Flash-spinning process and solution
    Patent number: 6638470
    Abstract: A process for flash-spinning a web of plexifilamentary film-fibril strands of synthetic fiber-forming polymer and laying down the web to form a nonwoven batt material therefrom is provided. The process includes the the step of generating a spin fluid consisting essentially of synthetic fiber-forming polymer and a spin agent, wherein the spin agent is comprised of at least 80% by weight, based on the total weight of the spin agent, of hydrocarbons comprised substantially exclusively of carbon and hydrogen atoms. The hydrocarbons are comprised of at least 25% by weight of unsaturated hydrocarbons having 4-8 carbon atoms.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: October 28, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Thomas A. J. Schweiger