Patents by Inventor Orlov Varely Domitrovichi

Orlov Varely Domitrovichi 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).

  • Method of manufacturing 3,3?,4,4?-tetraaminobiphenyl
    Patent number: 7601873
    Abstract: An object of the present invention is to provide an efficient method of manufacturing 3,3?,4,4?-tetraaminobiphenyl with a smaller number of steps. The manufacturing method of 3,3?,4,4?-tetraaminobiphenyl includes reacting the amino groups of a 4-halo-o-phenylenediamine with an inorganic sulfur compound to lead to a 5-halo-2,1,3-benzothiadiazole, subsequently coupling two molecules of the benzothiadiazole together to form a 5,5?-bis(2,1,3-benzothiadiazole) and then deprotecting the amino groups to yield 3,3?,4,4?-tetraaminobiphenyl.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: October 13, 2009
    Assignee: Showa Denko K.K.
    Inventors: Hiroshi Yasuda, Orlov Varely Domitrovichi
  • METHOD OF MANUFACTURING 3, 3' , 4, 4'-TETRAAMINOBIPHENYL
    Publication number: 20090149676
    Abstract: An object of the present invention is to provide an efficient method of manufacturing 3,3?,4,4?-tetraaminobiphenyl with a smaller number of steps. The manufacturing method of 3,3?,4,4?-tetraaminobiphenyl includes reacting the amino groups of a 4-halo-o-phenylenediamine with an inorganic sulfur compound to lead to a 5-halo-2,1,3-benzothiadiazole, subsequently coupling two molecules of the benzothiadiazole together to form a 5,5?-bis(2,1,3-benzothiadiazole) and then deprotecting the amino groups to yield 3,3?,4,4?-tetraaminobiphenyl.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 11, 2009
    Applicant: SHOWA DENKO K. K.
    Inventors: Hiroshi Yasuda, Orlov Varely Domitrovichi