Patents by Inventor Chien-Ping Chai Kao

Chien-Ping Chai Kao 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
  • Process for purifying perfluorinated products
    Patent number: 6458249
    Abstract: Nitrogen trifluoride (NF3) containing less than 10 parts-per-million molar impurities, e.g., tetrafluoromethane (PFC-14), is disclosed. Azeotropic and extractive distillation processes using entraining agents for separating NF3 and PFC-14 from each other and from mixtures with other electronics industry materials are disclosed.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: October 1, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ralph Newton Miller, Chien-Ping Chai Kao, Barry Asher Mahler
  • PROCESS FOR PURIFYING PERFLUORINATED PRODUCTS
    Publication number: 20020001560
    Abstract: Nitrogen trifluoride (NF3) containing less than 10 parts-per-million molar impurities, e.g., tetrafluoromethane (PFC-14), is disclosed. Azeotropic and extractive distillation processes using entraining agents for separating NF3 and PFC-14 from each other and from mixtures with other electronics industry materials are disclosed.
    Type: Application
    Filed: November 9, 1998
    Publication date: January 3, 2002
    Inventors: RALPH NEWTON MILLER, BARRY ASHER MAHLER, CHIEN-PING CHAI KAO