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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.:

US 5302571 B1

PDFFull Text
Date of Patent:
Apr. 12, 1994

Filed:

Jun. 14, 1993

Crystals of fluoran compound, crystalline solvates thereof, process for

Applicant:
Inventors:

Atsuo Otsuji, Kanagawa, JP;

Masakatsu Nakatsuka, Kanagawa, JP;

Kiyoharu Hasegawa, Kanagawa, JP;

Kazuyoshi Kikkawa, Kanagawa, JP;

Akihiro Yamaguchi, Kanagawa, JP;

Assignee:

Mitsui Toatsu Chemicals, Inc., Tokyo, JP;

Attorney:

Millen, White, Zelano, & Branigan

Primary Examiner:

Patrick J Ryan

Int. Cl.
CPC ...
B41M / ; B41M / ;
U.S. Cl.
CPC ...
503221 ; 427151 ; 503213 ;
Abstract

Disclosed are a crystal and crystalline solvate of a fluoran compound represented by the formula ##STR1## wherein R.sub.1 is ##STR2## and which are useful as chromogenic compounds in recording materials such as pressure-sensitive and heat-sensitive recording materials, a process for preparation of said crystal and said crystalline solvate, and recording materials comprising said crystal or said crystalline solvate.

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Otsuji, Atsuo. (1994). Crystals of fluoran compound, crystalline solvates thereof, process for (U.S. Patent No. 5302571). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5302571

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