Patents by Inventor Shuuichi Hashimoto

Shuuichi Hashimoto 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).

  • Crystal modification of 2-(3-methylanilion)-3-methyl-6-diethylamino-fluoran, process for the preparation thereof, and recording materials containing said crystal modification
    Patent number: 5376617
    Abstract: The improved .beta.-type crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran has high solubility in inner-phase solvents. The compound is very useful as a color former for pressure-sensitive recording materials and thermal recording materials. Recording materials that use this compound as color former exhibit good performance in various characteristics such as whiteness of the background, its storage stability, color rendition, sensitivity for color formation and color fastness of image.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: December 27, 1994
    Assignee: Yamamoto Chemicals, Inc.
    Inventors: Yojiro Kumagae, Shigeo Fujita, Mansuke Matsumoto, Sayuri Wada, Shuuichi Hashimoto
  • Crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran, process for the preparation thereof, and recording materials containing said crystal modification
    Patent number: 5338866
    Abstract: The improved .beta.-type crystal modification of 2-(3-methylanilino)-3-methyl-6-diethylaminofluoran has high solubility in inner-phase solvents. The compound is very useful as a color former for pressure-sensitive recording materials and thermal recording materials. Recording materials that use this compound as color former exhibit good performance in various characteristics such as whiteness of the background, its storage stability, color rendition, sensitivity for color formation and color fastness of image.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: August 16, 1994
    Assignee: Yamamoto Chemicals, Inc.
    Inventors: Yojiro Kumagae, Shigeo Fujita, Mansuke Matsumoto, Sayuri Wada, Shuuichi Hashimoto