Patents by Inventor Toshitake Kawakami

Toshitake Kawakami 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).

  • Agent and method for preserving freshness of cut flowers
    Patent number: 5679617
    Abstract: An agent for preserving freshness of cut flowers, which contains, as an active ingredient, at least one water-soluble polymer selected from the group consisting of:i) a polycondensation product obtained by a reaction of (a) at least one compound selected from the group consisting of an epihalohydrin, an alkylene dihalide, a diepoxide and a dihalogenoalkyl ether, with (b) at least one compound selected from the group consisting of an amine, a diamine and a polyamine,ii) an alkyleneimine polymer, andiii) a mixture of the polymers i) and ii).
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: October 21, 1997
    Assignees: Mitsubishi Chemical Corporation, Astro Corporation
    Inventors: Miho Hanafusa, Naoki Akiyama, Toshitake Kawakami