Patents by Inventor Yasuzi Takemoto

Yasuzi Takemoto 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).

  • Rubber composition with nitrogen and phosphorous compound
    Patent number: 4960833
    Abstract: A rubber composition containing(A) a bismaleimide compound represented by the general formula (I) ##STR1## wherein R is a divalent acyclic aliphatic group, cyclic aliphatic group, aromatic group, or alkylaromatic group, these groups optionally containing a hetero atom selected from O, N and S in their chain or side substituent,(B) a sulfenamide compound represented by the general formula (II) ##STR2## wherein R.sub.1 and R.sub.2 denote independently from each other a hydrogen atom, an acyclic aliphatic group, or cyclic aliphatic group, or R.sub.1 and R.sub.2 together denote a chain aliphatic group which optionally contains an oxygen atom, provided that R.sub.1 and R.sub.2 cannot simultaneously denote a hydrogen atom,(C) a dithiophosphoric acid compound represented by the general formula (III) ##STR3## wherein R.sub.3 and R.sub.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: October 2, 1990
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideo Nagasaki, Yasuzi Takemoto
  • Rubber composition with bismaleimides
    Patent number: 4803250
    Abstract: A rubber composition containing(A) a bismaleimide compound represented by the general formula (I) ##STR1## wherein R is a divalent acyclic aliphatic group, cyclic aliphatic group, aromatic group, or alkylaromatic group, these groups optionally containing a hetero atom selected from O, N and S in their chain or side substituent,(B) a sulfenamide compound represented by the general formula (II) ##STR2## wherein R.sub.1 and R.sub.2 denote independently from each other a hydrogen atom, an acyclic aliphatic group, or cyclic aliphatic group, or R.sub.1 and R.sub.2 together denote a chain aliphatic group which optionally contains an oxygen atom, provided that R.sub.1 and R.sub.2 cannot simultaneously denote a hydrogen atom,(C) a dithiophosphoric acid compound represented by the general formula (III) ##STR3## wherein R.sub.3 and R.sub.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: February 7, 1989
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideo Nagasaki, Yasuzi Takemoto