The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1995
Filed:
Jul. 02, 1993
Hideo Sawada, Tsukuba, JP;
Motohiro Mitani, Tsukuba, JP;
Masaharu Nakayama, Tsuchiura, JP;
Yoshii Morishita, Hitachi, JP;
Mitsuo Katayose, Hitachi, JP;
Tadashi Okamoto, Joyo, JP;
Nobuyuki Hayashi, Hitachi, JP;
Nippon Oil and Fats Co., Ltd., Tokyo, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Abstract
A derivative of naphthalocyanine containing a perfluoroalkyl group and having a particular structure for ensuring excellent weather-proof properties, extremely high solubility in various solvents and capability of forming a film, and an optical recording medium prepared by using the derivative and capable of recording while using a focused beam of a semiconductor laser or the like. The derivative of naphthalocyanine containing a perfluoroalkyl group may be prepared by reacting a perfluoroalkanoyl peroxide having a particular structure with a naphthalocyanine.