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:
Oct. 19, 1993
Filed:
Dec. 17, 1992
Kurt B Gundlach, Pittsford, NY (US);
Geoffrey A Nobes, Kitchener, CA;
Marcel P Breton, Mississauga, CA;
Richard L Colt, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Disclosed is an ink composition which comprises water, an anionic dye, and a compound selected from the group consisting of N,N'-bis(3-aminopropyl)-1,2-ethylenediamine, 1,4-bis(3-aminopropyl)piperazine, N,N'-bis(3-aminopropyl)-1,3-propanediamine, N,N'-bis(2-amionethyl)-1,3-propanediamine, N,N'-bis(3-aminopropyl)-1,4-butanediamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, nitrilotrisethylamine, N,N'-(diaminoethyl)piperazine, piperazinylethylethylenediamine, aminoethyltriethylenetetramine, aminoethylpiperazinylethylethylenediamine, piperazinylethyldiethylenetriamine, pentaethylene hexamine and mixtures thereof, said ink composition having a pH of more than about 8 and less than about 9. Further disclosed is an ink composition comprises water, a dye, a polyamine compound, and a monoamine compound of the general formula ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 are independently selected from the group consisting of hydrogen, alkyl, and substituted alkyl. In one embodiment, the polyamine compound is a first generation dendrimer compound having terminal primary amine groups.