Patents by Inventor Hirotsune Kondoh

Hirotsune Kondoh 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).

  • Phthalimide compounds and methods of producing same
    Patent number: 5382589
    Abstract: The present invention relates to phthalimide compounds represented by the following general formula (I) and their acid-added salts and to methods of producing the same: ##STR1## wherein Y represents --CH.sub.2 --CH.sub.2 -- or --CH.dbd.CH--. The present invention provides phthalimide compounds represented by the above general formula (I) and their acid-added salts, which are useful compounds as intermediates of medicines such as anti-ulcers based on histamine H.sub.2 receptor antagonism. In particular, acid-added salts of the phthalimide compounds can be easily refined by the recrystallization method. Therefore, there is provided an advantage that purity of the anti-ulcers which are derived from phthalimide compounds and their acid-added salts according to the present invention can be improved.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: January 17, 1995
    Assignee: Central Glass Company, Limited
    Inventors: Akihiro Ishii, Yasunobu Nishimura, Hirotsune Kondoh, Yoshiyuki Kikuchi