Patents by Inventor Nirohiko Inaba

Nirohiko Inaba 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: 4620205
    Abstract: A two-color thermosensitive recording material comprising a support material, a high temperature color-forming layer comprising a first leuco dye and a first color developer overlaying the support material, a decolorizing layer containing a decolorizing agent overlaying the high temperature color-forming layer, and a low-temperature color-forming layer comprising a second leuco dye and a second color developer overlaying the decolorizing layer, wherein the melting points of the first leuco dye and the first color developer of the high temperature color-forming layer are 150.degree. C. or higher, the melting points of the second leuco dye and the second color developer of the low temperature color-forming layer are 60.degree. C. or higher and the melting point of at least one of the second leuco dye and the second color developer is 130.degree. C. or lower, and the melting point of the decolorizing agent is in the range of 120.degree. C. to 160.degree. C.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: October 28, 1986
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyotaka Iiyama, Nirohiko Inaba