Patents by Inventor Takeshi Wakiya

Takeshi Wakiya 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).

  • Coated particles
    Publication number: 20040109995
    Abstract: It is an object of the invention to provide coated particles excellent in the reliability of connection.
    Type: Application
    Filed: June 19, 2003
    Publication date: June 10, 2004
    Inventors: Takeshi Wakiya, Takeharu Morita, Hiroshi Hiraike, Katsutoshi Nagai, Tatsuo Taniguchi
  • Process for producing vinyl polymer having functional group at end and vinyl polymer having functional group at end
    Publication number: 20040092619
    Abstract: The objective of the present invention is to provide a production method by which a polymer of a functional group-terminated vinyl monomer can be easily and practically produced.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 13, 2004
    Inventors: Takeshi Wakiya, Takamaro Kakehi
  • Process for producing vinyl polymer having functional group at end and vinyl polymer having functional group at end
    Patent number: 6693142
    Abstract: The objective of the present invention is to provide a production method by which a polymer of a functional group-terminated vinyl monomer can be easily and practically produced. Further, it is another object of the present invention to provide a functional group-terminated vinyl polymer which is useful as a material for the production of various functional products. The first aspect of the present invention is concerned with a production method of a functional group-terminated vinyl polymer comprising a step of synthesizing a halogen atom-terminated vinyl polymer by the radical polymerization reaction of a vinyl monomer in the presence of a halogen compound and a step of introducing a functional group to a terminus by substituting a functional group-containing group for the terminal halogen atom of said vinyl polymer.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: February 17, 2004
    Assignee: Sekisui Chemical Co., Ltd.
    Inventors: Takeshi Wakiya, Takamaro Kakehi
  • Percutaneously absorbable preparation containing cohesive strength improving agent
    Patent number: 5811117
    Abstract: A percutaneously absorbable preparation which contains norethisterone, estradiol or ester thereof, each of which is highly absorbable percutaneously, can readily be stuck to the skin, and is lowly skin irritating. It is prepared by applying a pressure-sentitive adhesive layer comprising a drug and a pressure-sensitive adhesive to one side of a support. The drug comprises at least one member selected from among norethisterone, estradiol and pharmacologically acceptable esters thereof, while the adhesive comprises a copolymer composed of 20-55 mol. % of vinylpyrrolidone and 80-45 mol. % of alkyl (C.sub.4 -C.sub.18) (meth)acrylate. The adhesive layer further contains a sorbifacient comprising 0.1-10 wt. % of at least one member selected from among dicarboxylic acids, hydroxy carboxylic acids, plyoxyethylene alkyl ethers and amide compounds and 5-40 wt. %, both based on the adhesive layer, of a higher fatty acid ester prepared from a C.sub.10 -C.sub.18 fatty acid and a C.sub.1 -C.sub.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: September 22, 1998
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masaki Hashimoto, Mitsuhito Mano, Mutsuki Amano, Takeshi Wakiya