Patents by Inventor Yukio Hitotsuyanagi

Yukio Hitotsuyanagi 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).

  • Cyclic hexapeptide compounds
    Patent number: 5922838
    Abstract: Object: To provide a cyclic hexapeptide compound having a distinguished pharmaceutical effect.Constitution: A cyclic hexapeptide compound represented by the following formula: ##STR1## where R is a group represented by the following formula: ##STR2## (where R.sup.1 and R.sup.2 are each an alkyl group, a phenyl group or a benzyl group) or a group represented by the following formula: ##STR3## (where n is an integer of 4 to 6), or its salts.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: July 13, 1999
    Assignees: Taisho Pharmaceutical Co., Ltd., Hideji Itokawa
    Inventors: Hideji Itokawa, Yukio Hitotsuyanagi, Takehiro Yamagishi
  • Thienodiazepine compounds and their pharmaceutical use
    Patent number: 4992437
    Abstract: Thienodiazepine compounds of the general formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and respectively stand for a hydrogen atom, a halogen, an alkyl or an aralkyl, or mean a group wherein R.sup.1 and R.sup.2 combinedly together form a ring; R.sup.3 stands for an oxygen atom, R.sup.4 stands for a hydrogen atom, an alkyl, an alkenyl or a group of the formula --(CH.sub.2).sub.m COOR.sup.6 (wherein R.sup.6 l stands for a hydrogen atom, an alkyl, an alkenyl or an aralkyl and m stands for an integer of 1-6), or R.sup.3 and R.sup.4 stand for a group wherein R.sup.3 and R.sup.4 combinedly together form a group of the formula .dbd.N--N.dbd.C(R.sup.5)-- [wherein R.sup.5 stands for a hydrogen atom, an alkyl, an alkenyl, an aralkyl or a group of the formula --(CH.sub.2).sub.n COOR.sup.7 (wherein R.sup.
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: February 12, 1991
    Assignee: Yoshitomi Pharmaceutical Industries, Ltd.
    Inventors: Yoichi Naka, Yukio Hitotsuyanagi, Keiichiro Haga, Masahiro Hosoya