Patents by Inventor Yasuhiko Otaki

Yasuhiko Otaki 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).

  • Process for producing nicotinic acid
    Patent number: 4001257
    Abstract: Nicotinic acid is produced by oxidizing dialkylpyridine such as 2-methyl-5-ethylpyridine, 2,5-lutidine and the like, with nitric acid by an amount of 100 to 118 percent, preferably 100 to 108 percent, to the theoretical oxidizing amount, at a temperature of 220.degree. to 240.degree. C, preferably 225 to 235.degree. C under a pressure of 30 to 45 kg/cm.sup.2 for 5 to 30 minutes.
    Type: Grant
    Filed: August 8, 1975
    Date of Patent: January 4, 1977
    Assignee: Nippon Soda Company Limited
    Inventors: Keiji Masuda, Hidenori Kizawa, Yasuhiko Otaki