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. 12, 1993
Filed:
Jun. 11, 1992
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is an ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR1## where R.sup.1 is a radical selected from the group of lower alkyl, lower alkoxy, --COOM, and --SO.sub.3 M; R.sup.2 and R.sup.3 are respectively a radical selected from the group of hydrogen, lower alkyl, lower alkoxy, amino, --NHCOCH.sub.3, --SO.sub.3 M, and --COOM; R.sup.4 and R.sup.5 are respectively a radical selected from the group of lower alkyl, lower alkoxy, --NHCOCH.sub.3, --SO.sub.3 M, and COOM; A is ##STR2## R.sup.6 is a radical selected from the group of acetyl, benzoyl, --SO.sub.2 C.sub.6 H.sub.5, --SO.sub.2 C.sub.6 H.sub.4 --CH.sub.3, phenyl, which is unsubstituted or substituted by --COOM or methyl, and ##STR3## R.sup.7 and R.sup.8 are respectively a radical selected from the group of hydrogen, hydroxyl, and --C.sub.2 H.sub.4 OH; R.sup.9 and R.sup.10 are respectively a radical selected from the group of hydrogen, amino, hydroxyl and lower alkoxy; n is 1 or 2; m is 0 or 1; and M is an alkali metal or ammonium.