1
Himangshu R Bhattacharjee: Photoactivatable leuco base time-temperature indicator. LifeLines Technology, Arthur J Plantamura, April 17, 1990: US04917503 (62 worldwide citation)

A photoactivated time-temperature indicator is based on a leuco base system. A thermally insensitive, white ("inactive") leuco base (or a mixture of such leuco bases) is mixed, preferably in a polymeric matrix, with a material that generates acid upon exposure to light. Photoexcitation, preferably b ...


2
Himangshu R Bhattacharjee: Activatable time-temperature indicator. LifeLines Technology, Arthur J Plantamura, March 14, 1989: US04812053 (59 worldwide citation)

An activatable time-temperature indicator consists of an oxygen-sensitive reaction product of a triarylmethane dye and a decolorant that is coated on a substrate and covered by an oxygen barrier. Optinally, an oxygen-permeable layer is between the coating and the oxygen barrier. The indicator is act ...


3
Himangshu R Bhattacharjee, James T Yardley, Thaddeus Prusik, Ronald R Chance: Photoactivatable time-temperature indicator. LifeLines Technology, Arthur J Plantamura, April 12, 1988: US04737463 (46 worldwide citation)

A photoactivated time-temperature indicator is based on diacetylenic salts. A thermally unreactive ("inactive") diacetylenic salt (or a mixture of such salts) is mixed, in a polymeric matrix, with a material that generates acid upon exposure to light. Photoexcitation, preferably by UV or near UV lig ...


4
Himangshu R Bhattacharjee, Edward Paley, Steven J Paley, Vincent C Caputo, Arthur Jacob: Cleaning sheet and method for cleaning paper path feed roller surfaces. The Texwipe Company, Samuelson & Jacob, July 13, 1993: US05227844 (36 worldwide citation)

The feed surfaces of feed rollers along the paper path of an imaging machine are cleaned by passing a cleaning sheet along the paper path through the imaging machine, the cleaning sheet including a substrate carrying a coating of synthetic polymeric material in a pattern which assures contact betwee ...


5
Karl W Beeson, Himangshu R Bhattacharjee, Frederick R Hopf: Thermally-stable, infrared-sensitive zinc oxide electrophotographic compositions element and process. Allied Corporation, James Riesenfeld, Gerhard H Fuchs, November 29, 1983: US04418135 (10 worldwide citation)

Electrophotographic compositions containing zinc oxide dispersed in a certain resin binder mixture and sensitized with a cyanine dye having a particular structure provide high sensitivity in the 780-840 nm wavelength range, excellent thermal stability, long dark decay time and near-white appearance. ...


6
Yash P Khanna, Himangshu R Bhattacharjee, Rakesh Kumar, Jon I Williams, John P Sibilia: Method of blow molding polyamides. Allied Signal, Richard C Stewart, Gerhard H Fuchs, October 24, 1989: US04876127 (6 worldwide citation)

This invention relates to a process for blow molding polyamide compositions where the molten polyamide includes an effective amount of one or more aryl phosphoryl azide compounds.


7
Himangshu R Bhattacharjee, Jon I Williams, Michael D Swerdloff, Morris B Berenbaum: Process for preparing co-poly(amides/peptides). Allied Signal, Darryl L Webster, Richard C Stewart, August 20, 1991: US05041497 (5 worldwide citation)

A process for preparing a co-poly(amide/peptide) by reacting polymeric or oligomeric polypeptides and polymeric or oligomeric polyamides in the presence of an effective amount of one or more aryl phosphoryl azide compounds.


8
Gordhanbhai N Patel, Anthony F Preziosi, Himangshu R Bhattacharjee, Lester T C Lee: Coloration of acetylenic monomers by gases. Allied Corporation, Alan M Doernberg, Gerhard H Fuchs, Kenneth E Stroup, October 29, 1985: US04550150 (4 worldwide citation)

Process of detecting the presence of certain gases, including certain pollutants, in small concentrations; or to cause partial polymerization of certain polyacetylene compositions for use in time/temperature history indicators or radiation dosage indicators. The process involves contacting a reactiv ...


9
Himangshu R Bhattacharjee: Kit and method for detecting lithium ions. Allied Signal, Richard C Stewart II, Gerhard H Fuchs, February 14, 1989: US04804630 (4 worldwide citation)

A kit and method for detecting lithium ions in a sample. The kit includes a lithium ion selective color indicator which is a leuco precursor of an arylmethane dye dispersed in a matrix. In use, the color indicator is contacted with a sample and any color change therein is monitored. A color change i ...


10
Himangshu R Bhattacharjee, Yash P Khanna: Process for increasing the melt viscosity and/or melt elasticity of polyamides with aryl phosphoryl azide. Allied Signal, Richard C Stewart, Gerhard H Fuchs, March 6, 1990: US04906708 (3 worldwide citation)

A process for decreasing the melt index and increasing the melt viscosity and melt elasticity of polyamide by adding thereto an effective amount of an aryl phosphoryl azide compound as for example diphenyl phosphoryl azide, and thereafter heating the composition until the desired changes in melt ind ...