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:
May. 09, 2006
Filed:
May. 01, 2002
Asutosh Nigam, Freemont, CA (US);
Asutosh Nigam, Freemont, CA (US);
Pixterra, Inc., San Jose, CA (US);
Abstract
The present invention provides a process for making a coated substrate such as paper, by utilizing a coating composition containing a nitrogenous dye-fixing compound. The coating compositions utilized in the process contains from 5–95 wt. percent of a film-forming binder mixed with a dye fixing compound, dye fixing polymer or a mixture thereof that includes a dye fixing compound selected from a biguanidine compound, a guanidine oligomer, or a derivative, which is a member selected from the such group consisting of chlorhexidine, chlorguanide, an oligomer of a chlorhexidine or chlorguanidine derivative, or a salt thereof, wherein the ink-receptive surface coating composition or agent may also include at least one organic or inorganic cross-linker, as well as other coating substituents. The coating compositions provide a coated substrate that provides high quality printed images when printed with an ink containing a reactive dye having ionizable and/or nucleophilic groups capable of reacting with the coating agent, and images are bleed-resistant, water-resistant (e.g., water-fast), and/or are characterized by an enhanced chroma and hue.