Patents by Inventor Ming F. Chen

Ming F. Chen 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).

  • Process for preparing glycine in high yield
    Patent number: 5155264
    Abstract: Desclosed is a process for preparing glycine in a high yield, which comprises reacting a carboxymethyl quaternary ammonium chloride represented by the following structural formula (I):Cl(R.sub.3 NCH.sub.2 COOH) (I)wherein R represents an alkyl group having 1 to 4 carbon atoms,with an aminomethanol derivative represented by the following structural formula (II): ##STR1## wherein R.sub.1 represents a hydrogen atom or a CH.sub.2 OH group, in a solvent.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: October 13, 1992
    Assignee: Hakko Tsusho CO., Ltd.
    Inventor: Ming F. Chen
  • Process for preparing 1,1'-dialkyl-4,4'-bipyridylium dihalide
    Patent number: 4223150
    Abstract: 1,1' dialkyl -4,4'-bipyridylium dihalide is prepared by heating 4,4'-bipyridyl with an .alpha.-halogen substituted organic acid of formula X R.sub.1 COOH where X is Cl or Br, R is C.sub.1-3, preferably monochloroacetic acid alkyl group in the presence of water until the pH is below 4.0.
    Type: Grant
    Filed: October 10, 1978
    Date of Patent: September 16, 1980
    Assignee: Cheng Hong Chemical Co., Ltd.
    Inventor: Ming F. Chen