International Business Machines Corporation

Lexmark Corporation

Paul L Gendler

Robert J Twieg

William E Bernier

Clinton David Snyder

Edmond Otto Fey

Arthur F Diaz

Barbara D Grant

Thomas Edward Karis

Donald A Stremel

Alfred H Sporer

Francis Emmi

Juan Ayalia-Esquilin

Ying-Ying Cheng

The present invention relates to an ink composition for ink jet printers comprising an amorphous bis amide, a colorant and a solvent.

Ink composition

A substantially aqueous composition for drop on demand ink jet printing comprising a fluid vehicle with greater than 50% by weight water, a water soluble dye in the range of 1-10% by weight, a lower alkylene glycol plasticizer in the range of concentration of 1-20% by weight, and in the range of 1-10% by weight, a water soluble additive which is a low molecular weight heterocyclic, bifunctional monomer or dimer in which the two functional groups are either two imide groups, or a hydantoin bearing a carboxylic acid group, with both the imide groups and the amide groups being capped with hydroxyalkylene units.

Ink composition for drop-on-demand ink jet

Certain phenazine leucodyes are useful in electrochromic recording systems.

Phenazine leucodyes for electrochromic recording

An electrochromic printable medium which includes a substrate coated with certain organic compounds and with the reduced form of an oxidizing agent; and use thereof for electrochromic printing.

Electrochromic printing

A printing medium which includes a substrate coated with a compound of the formula: ##STR1## wherein R.sub.3 is a ring group having certain substituents in at least one ortho position with respect to the atom connected to C.dbd.O; and each R.sub.1 and R.sub.2 individually is aryl or alkaryl or are interconnected to form with the nitrogen atom a phenothiazine, phenoxazine, or phenazine or substituted derivative; and coated with an oxidizing agent or reduced form thereof; and method of use.

Printing medium and use thereof

An electrochromic recording substrate comprising bromide ions and a leucodye having the structure ##STR1## wherein R is lower alkyl, lower alkoxy, lower thioalkyl, lower dialkylamino, or diarylamino.

Phenothiazine leucodyes for electrochromic recording

A medium for electrochromic recording is provided by treating paper with a water soluble leuco methylene blue compound having the formula ##STR1## wherein R is a sulfonated aromatic or sulfonated aliphatic moiety.

Growing community of inventors

San Jose, CA, United States of America

Paul L Gendler