Patents by Inventor Koichi Takee

Koichi Takee 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 the production of ester compounds
    Patent number: 5081280
    Abstract: In producing ester compound useful as an antioxidant for organic materials which are represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and represent hydrogen or straight or branched chain alkyl radicals containing 1-8 carbon atoms, Z is an organic radical derived from an n-hydroxy alcohol, and n denotes an integer of 1 to 4, by transesterification, monoalkyltin compounds are used as a catalyst, whereby the ester compounds can be produced with high quality and in high yields.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: January 14, 1992
    Assignee: Yoshitomi Pharmaceutical Industries, Ltd.
    Inventors: Koichi Takee, Masayoshi Gohbayashi, Kunihide Oka