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For the Inventor, By the Inventor

Ichihara, Japan

Takao Ishihara

USPTO Granted Patents = 4

Average Co-Inventor Count = 4.2

ph-index = 3

Forward Citations = 61(Granted Patents)


Location History:

  • Iwaki, JA (1977)
  • Ichihara, JP (1980 - 1982)
  • Iwaki, JP (1993)

Company Filing History:

goldMedal4 out of 776 
 
Kureha Kagaku Kogyo Kabushiki Kaisha
 patents
silverMedal1 out of 59 
 
Chiyoda Chemical Engineering Construction Co., Ltd.
 patents
bronzeMedal1 out of 929 
 
Sumitomo Metal Industries, Inc.
 patents
4. 1 out of 8 
 
Sumikin Coke Company Limited
 patents
where one patent can have more than one assignee

Years Active: 1977-1993

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4 patents (USPTO):Explore Patents
1. 5236688 - Method for activating infusibilized pitch beads (1993-08-17),
2. 4340464 - Method for thermal cracking of heavy petroleum oil (1982-07-20),
3. 4214979 - Method of thermally cracking heavy petroleum oil (1980-07-29),
4. 4050910 - Apparatus and method for removing pitch from thermally cracked gas (1977-09-27),
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