Patents by Inventor Shean-Jeng Jong

Shean-Jeng Jong 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 of synthesizing polyimides
    Publication number: 20030232963
    Abstract: A solvent-free, catalyst-free and contamination-free method of synthesis of polyimides is disclosed. The method includes polymerizing a diamine with 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) at a pressure of 0.1-760 mm Hg, preferably a reduced pressure at about 36 mm Hg, and a temperature of 90-400° C., preferably 10-240° C.
    Type: Application
    Filed: June 6, 2002
    Publication date: December 18, 2003
    Applicant: Chung-Shan Institute of Science & Technology
    Inventor: Shean-Jeng Jong
  • Method for the preparation of ferroceny1-1,3-butadiene
    Patent number: 6664409
    Abstract: Ferrocenaldehyde or ferrocenyl methyl ketone and allyl bromide are reacted in an ether solvent and in the presence of magnesium metal as a catalyst. The liquid portion of the reaction mixture is introduced into a silica gel column, wherein the weak acidity of the silica gel is able to dehydrate the reaction intermediate 1-ferrocenyl-3-buten-1-ol product. The column is eluted with n-hexane, and after evaporating the solvent from the eluate collected, a purified ferrocenyl-1,3-butadiene product is obtained.
    Type: Grant
    Filed: May 6, 2003
    Date of Patent: December 16, 2003
    Assignee: Chung-Shan Institute of Science & Technology
    Inventor: Shean-Jeng Jong
  • Process for preparing chlorotrifluoroethylene homopolymers having a low molecular weight
    Patent number: 6627716
    Abstract: A chlorotrifluoroethylene homopolymer is prepared by polymering chlorotrifluoroethylene monomers in an ester solvent and in the presence of t-butyl peroxypivalate as a radical initiator. The polymerization application can be carried at about 60° C., and the resulting chlorotrifluoroethylene homopolymer has a number average molecular weight of about 1700.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: September 30, 2003
    Assignee: Chung-Shan Institute of Science & Technology
    Inventor: Shean-Jeng Jong
  • Method of manufacturing ferrocenyl-1,3-butadiene
    Patent number: 6211392
    Abstract: The present invention relates to a method of manufacturing ferrocenyl-1,3-butadiene, in which a ferrocenecarbonyl is reacted with an allyl halide in a polar aprotic solvent lacking a carbonyl group and containing a samarium diiodide in a temperature range.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: April 3, 2001
    Assignee: National Science Council
    Inventors: Jim-Min Fang, Shean-Jeng Jong