Patents by Inventor Katsuyoushi Yamakawa

Katsuyoushi Yamakawa 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 producing croconic acid or salt thereof
    Publication number: 20060224022
    Abstract: Croconic acid or a salt thereof is easily produced at low cost by a reaction of a hydrocarbon compound consisting of a five-membered ring or a hydrocarbon compound consisting of a five-membered ring having an oxo group and/or a monovalent group linked via an oxygen atom with a halogenating agent.
    Type: Application
    Filed: March 31, 2006
    Publication date: October 5, 2006
    Inventors: Keizou Kimura, Katsuyoushi Yamakawa