Patents by Inventor Takamitsu Tamura

Takamitsu Tamura 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).

  • Patent number: 4931562
    Abstract: A bleaching composition comprises:(A) hydrogen peroxide and/or a hydrogen peroxide addition compound such as a percarbonate; and(B) at least one activator which is a nitrogen-containing heterocyclic compound in which a halogen atom is substituted for the hydrogen atom of the secondary amino group or a non-heterocyclic N-halo-hindered amine compound, the hydrolysis constant of the activator being within the range of 1.times.10.sup.-10 to 5.times.10.sup.-6 (at 25.degree. C.). Examples of the activator include 1-chloro-piperidine, 1-chloro-2-methyl-piperidine, 1-chloro-isonipecotic acid, 1-chloro- -hexamethyleneimine and 1-chloro-.epsilon.-caprolactam. The bleaching-detergent composition may also contain the components (A) and (B) together with a surfactant. These compositions exhibit an excellent effect concerning bleaching at low temperature, but hardly affect the colors of colored and patterned clothes.
    Type: Grant
    Filed: January 11, 1989
    Date of Patent: June 5, 1990
    Assignees: Lion Corporation, Sankyo Company Limited
    Inventors: Yasuhiro Akabane, Takamitsu Tamura, Masami Fujiwara
  • Patent number: 4820437
    Abstract: A bleaching composition comprises:(A) hydrogen peroxide and/or a hydrogen peroxide addition compound such as a percarbonate; and(B) at least one activator which is a nitrogen-containing heterocyclic compound in which a halgoen atom is substituted for the hydrogen atom of the secondary amino group or a non-heterocyclic N-halo-hindered amine compound, the hydrolysis constant of the activator being within the range of 1.times.10.sup.-10 to 5.times.10.sup.-6 (at 25.degree. C.). Examples of the activator includes 1-chloro-piperidine, 1-chloro-2-methyl-piperidine, 1-chloro-isonipecotic acid, 1-chloro- -hexamethyleneimine and 1-chloro-.epsilon.-caprolactam. The bleaching-detergent composition may also contain the components (A) and (B) together with a surfactant. These compositions exhibit an excellent effect concerning bleaching at low temperature, but hardly affect the colors of colored and patterned clothes.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: April 11, 1989
    Assignee: Lion Corporation
    Inventors: Yasuhiro Akabane, Takamitsu Tamura, Masami Fujiwara