Patents by Inventor Masaji Enokuchi

Masaji Enokuchi 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: 6403666
    Abstract: Provided is a polyolefin base porous film comprising a polyolefin composition in which calcium carbonate particles, preferably calcium carbonate particles subjected to surface treatment with chain carboxylic acid having 3 to 6 carbon atoms are dispersed. This polyolefin base porous film is characterized by that the leached solution with water has a pH which falls in the vicinity of neutrality and has a low stimulation to the skin, and therefore it is useful for goods contacting human bodies, particularly a back sheet for a sanitary napkin.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: June 11, 2002
    Assignee: Tokuyama Corporation
    Inventors: Nobuhiko Nakayama, Masaji Enokuchi
  • Patent number: 4774275
    Abstract: Disclosed is a polypropylene composition comprising (a) 100 parts by weight of a propylene copolymer, (b) 0.01 to 0.5 part by weight of a heat stabilizer and (c) 0.1 to 10 parts by weight of a diphenyl ether compound represented by the following general formula: ##STR1## wherein R.sub.1 stands for an unsubstituted phenyl group or a phenyl group substituted with an alkyl group having 1 to 4 carbon atoms, or an alkyl group having 10 to 30 carbon atoms, R.sub.2 stands for an unsubstituted phenoxy group or a phenoxy group substituted with an alkyl group having 1 to 4 carbon atoms, or an alkyl group having 10 to 30 carbon atoms, and m and n stand for an integer of from 0 to 4, with the proviso that the case where each of m and n is 0 is excluded.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: September 27, 1988
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Shigeo Hisano, Yoji Tamano, Masaji Enokuchi