Patents by Inventor Toshihiko Tohma

Toshihiko Tohma 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 a fluoroalkanol
    Patent number: 6861565
    Abstract: A process for producing a fluoroalkanol which can easily be industrially practiced with high selectivity, is provided. CHR1R2OH, a radical initiator and CF2?CFRf are continuously supplied and reacted at from 105 to 135° C., and H—(RfCFCF2)n—CR1R2—OH formed, is continuously discharged. Here, each of R1 and R2 is a hydrogen atom or a C1-3 alkyl group, Rf is a fluorine atom or a C1-4 polyfluoroalkyl group, and n is an integer of from 1 to 4.
    Type: Grant
    Filed: March 10, 2003
    Date of Patent: March 1, 2005
    Assignee: Asahi Glass Company, Limited
    Inventors: Toshihiko Tohma, Akihiro Wada
  • Process for producing a fluoroalkanol
    Publication number: 20030158452
    Abstract: A process for producing a fluoroalkanol which can easily be industrially practiced with high selectivity, is provided.
    Type: Application
    Filed: March 10, 2003
    Publication date: August 21, 2003
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Toshihiko Tohma, Akihiro Wada
  • Method for producing an optically active 1-substituted 2-propanol
    Patent number: 6172268
    Abstract: A method for producing an optically active 1-substituted 2-propanol of the following formula 1, which comprises reacting a hydroxy aromatic compound of the following formula 2 with an optically active propylene oxide in the presence of a catalyst: AOH  Formula 2 CH3C*H(OH)CH2OA  Formula 1 wherein A is a univalent aromatic group, and C* is an asymmetric carbon atom.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: January 9, 2001
    Assignee: Asahi Glass Company, Limited
    Inventors: Toshihiko Tohma, Tomoyuki Asai