Patents by Inventor Hajimu Yamamoto

Hajimu Yamamoto 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).

  • Complex of tea-leaf extract and active aluminum hydroxide
    Patent number: 4913909
    Abstract: Extract of tea leaves or (-)-epigallocatechin gallate as the principal ingredient of the extract forms a complex with active aluminum hydroxide. The animal test using rats has established that these complexes have therapeutic effect for gastric ulcers, e.g. pylorus-ligated ulcer and indomethacin-induced ulcer, when orally administered. Tests were also undertaken for the effect on the secretion of gastric juice and acute toxicity of these complexes using rats and mice as the test animals.
    Type: Grant
    Filed: October 2, 1986
    Date of Patent: April 3, 1990
    Assignee: Mitsui Norin Co., Ltd.
    Inventors: Yukihiko Hara, Hajime Asai, Tadashi Kitamikado, Hajimu Yamamoto, Kazuo Okushio, Kozo Nakamura
  • Thiopyranopyrimidine compounds and acid addition salts thereof
    Patent number: 4435566
    Abstract: Novel thiopyranopyrimidine compounds and the pharmaceutically acceptable acid addition salts thereof having excellent hypoglycemic activity, platelet aggregation inhibitory activity, antihistamine activity and anti-allergy activity useful for prevention and treatment of various disorders caused by diabetes, allergy and the like are disclosed.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: March 6, 1984
    Assignee: Maruko Seiyaku Co., Ltd.
    Inventors: Sachio Ohno, Kiyoshi Mizukoshi, Osamu Komatsu, Hajimu Yamamoto, Yasuo Kunou
  • 1,5-Benzothiazepine compounds
    Patent number: 4264497
    Abstract: Cis or trans-1,5-benzothiazepine compounds represented by the formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group and R.sub.2 represents a hydrogen atom, an alkyl group or a hydroxyalkyl group and the pharmaceutically acceptable acid addition salts and quaternary ammonium salts thereof which exhibit anticholinergic activity and are useful as anti-ulcer, gastric secretion inhibiting and antispasmodic agents in mammals, and a process for preparing the same.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: April 28, 1981
    Assignee: Maruko Seiyaku Co., Ltd.
    Inventors: Sachio Ohno, Kihachiro Izumi, Kiyoshi Mizukoshi, Kazuo Kato, Hajimu Yamamoto, Mitsuaki Nagasaka, Yoshiki Nakamura, Mikio Hori