Patents by Inventor Kunichika Murakami

Kunichika Murakami 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).

  • Pharmaceutical composition containing 2-amino-6-chloropurine-9-.beta.-D-2',3'-dideoxyribofuranoxside
    Patent number: 5580860
    Abstract: An anti-AIDS virus agent is disclosed, which is characterized in that it contains the 2',3'-dideoxypurinenucleosides represented by the chemical formula (I): ##STR1## as an effective ingredient.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: December 3, 1996
    Assignee: Sanyo Kokusaku Pulp Co., Ltd.
    Inventors: Eiji Kojima, Hidetoshi Yoshioka, Kunichika Murakami, Hiroaki Mitsuya, Takuma Shirasaka, Samuel Broder
  • 2',3'-dideoxy purine nucleosides and process for the preparation thereof
    Patent number: 5563049
    Abstract: 2',3'-Dideoxy purine nucleosides represented by following general formulae [I] and/or [II] ##STR1## (wherein X and Y indicate nitrogen atoms or carbon atoms and R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 indicate each independently any of hydrogen atom, hydroxyl group, amino group, alkyl group, halogen atom, alkoxy group and mercapto group) are produced by bioconversion with strains of E. coli, K. pneumoniae and E. herbicola.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: October 8, 1996
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Eiji Kojima, Hidetoshi Yoshioka, Hidenori Fukinbara, Kunichika Murakami
  • Antiviral disinfecting composition and method of inactivating the AIDS virus in vitro
    Patent number: 5223258
    Abstract: An antiviral medicinal composition having spent liquor from kraft pulping and/or processed products thereof (kraft lignin, sulfomethylated and/or sulfopropylated kraft lignin) as major constituents, are effective agents in therapeutic and/or preventive methods against AIDS.
    Type: Grant
    Filed: January 11, 1990
    Date of Patent: June 29, 1993
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Makoto Machida, Makoto Yashiro, Kunichika Murakami
  • 2',3'-dideoxy purine nucleoside
    Patent number: 5053499
    Abstract: 2', 3'-Dideoxy purine nucleosides represented by following general formulae [I] and/or [II] ##STR1## (wherein X and Y indicate nitrogen atoms or carbon atoms and R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 indicate each independently any of hydrogen atom, hydroxyl group, amino group, alkyl group, halogen atom, alkoxy group and mercapto group), process for the preparation thereof and applications thereof to the antiviral agent, antiretroviral agent, therapeutic drug and preventive drug for acquired immunodeficiency syndrome (AIDS), and experimental medicine and experimental reagent to be used in genetic engineering are claimed.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: October 1, 1991
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Eiji Kojima, Hidetoshi Yoshioka, Hidenori Fukinbara, Kunichika Murakami
  • 2',3'-dideoxy-4-thio-uridine derivatives, process for their preparation and antivirus agents using them
    Patent number: 4954485
    Abstract: 2',3'-Dideoxy-4-thio-uridine derivatives represented by a following general formula ##STR1## (wherein R indicates hydrogen or protecting groups such as acetyl group, benzoyl group, trityl groups, etc.), process for their preparation, antivirus agents used them as effective ingredients and therapeutic method and therapeutic drugs for virus diseases are disclosed.
    Type: Grant
    Filed: June 1, 1988
    Date of Patent: September 4, 1990
    Assignee: Sanyo-Kokusaku Pulp Co., Ltd.
    Inventors: Hidetoshi Yoshioka, Eiji Kojima, Shuji Ishida, Hiroyuki Yoshioka, Kunichika Murakami