Patents Represented by Attorney Davis & Bujold, P.L.C.

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  • Water detection composition and water detection indicator
    Patent number: 7772215
    Abstract: A novel water detection composition for use in place of blue gel and a water detection indicator. The water detection composition comprises, as active components, a porphyrin complex, and at least one inorganic acid salt of a metal selected from a group consisting of alkali metals, alkaline earth metals, Al and Fe. The porphyrin complex is: wherein M is P, X is selected from a group consisting of a halogen and OH, and R2 is phenyl, and the water detection composition is supported by a silica gel.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: August 10, 2010
    Assignee: Fuji Silysia Chemical Ltd.
    Inventor: Yoshiyuki Fueda