Patents by Inventor Mitsuhiro Hamajima

Mitsuhiro Hamajima 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).

  • Antifouling agent
    Patent number: 5505770
    Abstract: An antifouling agent characterized by containing one or more compounds represented by the following general formula (I) as an active ingredient: ##STR1## (wherein R.sub.1, R.sub.2 and R.sub.3 independently represent each a hydrogen atom, a halogen atom or an alkyl group carrying 1 to 30 carbon atoms; X represents an inorganic oxygen acid residue; n is from 1 to 4; m is from 0 to 3; and R.sub.4 represents a hydrogen atom or an alkyl or alkenyl group carrying 1 to 30 carbon atoms and optionally having an ether bond.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: April 9, 1996
    Assignee: Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Ryoji Kimura, Mitsuhiro Hamajima
  • Antifouling agent
    Patent number: 5472483
    Abstract: An antifouling agent containing, as an active ingredient, one or more compounds represented by formula (I): ##STR1## wherein R represents an alkyl group; R.sub.1 represents an alkylene group; n represents an integer of 2 to 5; m and p each represent 0 or 1; X represents a nitro group, an alkyl group, an alkoxy group, a halogen atom or a hydrogen atom; and Y represents a nitro group or a halogen atom; provided that the sum of m and p is 1 or 2.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: December 5, 1995
    Assignee: Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Ryoji Kimura, Mitsuhiro Hamajima
  • Composition of stabilized synthetic resin
    Patent number: 4885326
    Abstract: A synthetic resin composition comprises 100 parts by weight of a synthetic resin, 0.001 to 10 parts by weight of a cyclic alkylphosphite compound of 2,2'-alkylidene-bisphenol (I) and 0.001 to 10 parts by weight of beta-(3,5-dialkyl-4-hydroxyphenyl)-propionic acid ester (II) and is stabilized to light and heat.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: December 5, 1989
    Assignee: Adeka Argus Chemical Co., Ltd.
    Inventors: Tohru Haruna, Kazunori Nishikawa, Mitsuhiro Hamajima