Patents by Inventor Yasusi Furuta

Yasusi Furuta 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).

  • Fluorescent detecting agents
    Patent number: 5518656
    Abstract: A fluorescent detecting agent comprising a naphthalene compound of formula (I) ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different and each represents an alkyl group of 4 to 8 carbon atoms and/or a pyraxoline compound of formula (II) ##STR2## wherein R.sup.3 and R.sup.4 may be the same or different and each represents hydrogen, an alkoxy group of 1 to 8 carbon atoms or an alkyl group of 4 to 8 carbon atoms, provided that at least one of R.sup.3 and R.sup.4 represents an alkyl group of 4 to 8 carbon atoms. They are used for a visual inspection or an automatic optical inspection (AOI) and a fluorescent penetrant examination.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: May 21, 1996
    Assignee: Nippon Chemical Works Co., Ltd.
    Inventors: Yasusi Furuta, Yoshisada Tamura