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For the Inventor, By the Inventor

Fujioka, Japan

Hiroshi Yoshikawa

USPTO Granted Patents = 8

Average Co-Inventor Count = 2.4

ph-index = 4

Forward Citations = 40(Granted Patents)


Location History:

  • Takasaki, JP (1980)
  • Fujioka, JP (1981 - 1998)

Company Filing History:

goldMedal6 out of 775 
 
Nippon Kayaku Kabushiki Kaisha
 patents
silverMedal2 out of 212 
 
Zaidan Hojin Biseibutsu Kagaku Kenkyu Kai
 patents

Years Active: 1980-1998

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8 patents (USPTO):Explore Patents
1. 5821348 - Process for producing etoposide (1998-10-13),
2. 5637680 - Process for the preparation of etoposide phosphate and intermediate (1997-06-10),
3. 5606039 - Etoposide phosphate and preparative intermediates (1997-02-25),
4. 5028598 - Oxetanocin derivatives and their salts as well as use thereof (1991-07-02),
5. 4716221 - 4'-demethyl-4-epipodophyllotoxin derivative (1987-12-29),
6. 4547567 - Derivatives of 4'-demethyl-4-epipodophyllotoxin (1985-10-15),
7. 4285883 - Process for producing 2-chloro-6-nitrobenzonitrile (1981-08-25),
8. 4225534 - Process for the production of 2-chlorobenzonitrile derivatives (1980-09-30),
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