Patents by Inventor Tomoaki Iwasa

Tomoaki Iwasa 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).

  • Prodrug compounds, process for the preparation thereof and sustained release preparation comprising the same
    Patent number: 4772594
    Abstract: The invention relates to a novel prodrug compound useful in the treatment of tumors, of the formula:A--CO(CH.sub.2).sub.m (NHCO).sub.n --RwhereinA is a residue of an antitumor substance having >NH or --NH.sub.2 group in the molecule,R is a residue of cholesterol,m is an integer of 1 or 2 andn is 0 or 1,and its salts.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: September 20, 1988
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Masashi Hashimoto, Hidekazu Takeno, Hiroshi Kayakiri, Akira Kagayama, Yuji Tokunaga, Tomoaki Iwasa