Patents by Inventor Subhankar Chatterjee

Subhankar Chatterjee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080120834
    Abstract: The invention provides an article and process for producing electronic devices. More particularly the invention relates to an article and process for fabricating patterns of electrically conductive materials on non-electrically conductive substrates by laser ablation. Such an article and process find use in the production of RDIF devices, antennae, electrical circuits, microwave susceptors, contacts, leads, conductors, interactive displays, electrostatic shielding devices and the like. The process involves first providing an electrically conductive metal layer on an electrically non-conductive substrate. Then an electronic circuit is electrically connected to the electrically conductive metal layer.
    Type: Application
    Filed: July 2, 2007
    Publication date: May 29, 2008
    Inventors: Mikhail Laksin, Subhankar Chatterjee
  • Publication number: 20070263060
    Abstract: The present invention provides a liquid printing ink that produces high quality flexographic or gravure printing images that have excellent solvent and abrasion resistance. In addition, the printing ink of the invention has high re-solubility, even after complete drying, upon contact with the liquid vehicle of the same ink, thereby preventing clogging of the printing plate, anilox or gravure cylinders over time. These characteristics of the printing ink are obtained by preparing a hybrid ink in which conventional organic solvent and/or water-based liquid inks are mixed with energy curable monomers and/or oligomers of resins and, optionally, a photoinitiator. After drying the ink, the printed images are exposed to an actinic radiation so that highly cross-linked polymers are formed in the printed images, which become water, chemical and abrasion-resistant.
    Type: Application
    Filed: January 14, 2005
    Publication date: November 15, 2007
    Inventors: Mikhail Laksin, Subhankar Chatterjee, David Biro
  • Publication number: 20060243148
    Abstract: Disclosed is a process for preparing a digital printing plate for flexographic and letterpress printing consisting of irradiating a polymeric material covering the plate to cause collapse of a non-image area on said plate.
    Type: Application
    Filed: April 29, 2005
    Publication date: November 2, 2006
    Inventors: Mikhail Laksin, Subhankar Chatterjee, Wojciech Wilczak
  • Publication number: 20060229412
    Abstract: An energy curable aqueous composition is disclosed containing: water; an ethylenically unsaturated oligomer; and a resin not containing energy curable functional groups.
    Type: Application
    Filed: April 12, 2005
    Publication date: October 12, 2006
    Inventors: Mikhail Laksin, Ralph Arcurio, Prasad Adhikari, Subhankar Chatterjee, Volker Linzer, Richard Czarnecki, Jitendra Modi
  • Publication number: 20060225596
    Abstract: A digital printing process is disclosed comprising transferring energy curable paste inks from a digital printing plate onto a substrate by wet trapping, wherein said digital printing plate comprises polymeric material covering the plate and collapsed in areas to form a non-image area on said plate.
    Type: Application
    Filed: April 7, 2005
    Publication date: October 12, 2006
    Inventors: Mikhail Laksin, Subhankar Chatterjee, Jean-Dominique Turgis, Wojciech Wilczak
  • Patent number: 7037953
    Abstract: A method for producing a solvent resistant, low-extractable, film from an actinic radiation curable homogenous aqueous composition containing a water soluble compound, having at least one alpha, beta-ethylenically unsaturated radiation polymerizable double bond, and water as essential components.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: May 2, 2006
    Assignee: Sun Chemical Corporation
    Inventors: Subhankar Chatterjee, Mikhail Laksin, David Biro, Jean Dominique Turgis
  • Patent number: 6803112
    Abstract: A method for producing a low-extractable film packaging from an actinic radiation curable aqueous composition containing a water soluble compound having at least one &agr;, &bgr;-ethylenically unsaturated, radiation polymerizable group and water as essential components carried out by applying the aqueous composition to a surface which is then irradiated in a single step with actinic radiation in the presence of the water thereby forming a cured film wherein less than 50 ppb of the water soluble compound or its residual components are extractable by a food simulant.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: October 12, 2004
    Assignee: Sun Chemical Corporation
    Inventors: Subhankar Chatterjee, Mikhail Laksin, David Biro, Jean Dominique Turgis
  • Publication number: 20040180226
    Abstract: A method for producing a low-extractable film which complies with governmental requirements for direct contact with food, medicine and cosmetics, from an actinic radiation curable homogeneous aqueous composition containing a water soluble compound having at least one &agr;,&bgr;-ethylenically unsaturated, radiation polymerizable group and water carried out by applying the homogeneous aqueous composition to a surface then irradiating the surface with actinic radiation in the presence of the water. Low extractable films, packaging materials and printing inks made from same are also disclosed.
    Type: Application
    Filed: December 19, 2003
    Publication date: September 16, 2004
    Inventors: Subhankar Chatterjee, Mikhail Laksin, David Biro, Jean Dominque Turgis
  • Publication number: 20040157959
    Abstract: Homogenous, aqueous, energy curable printing ink compositions containing metallic colorants.
    Type: Application
    Filed: December 5, 2003
    Publication date: August 12, 2004
    Inventors: Jean Dominique Turgis, Richard R.M. Jones, Kai-Uwe Gaudl, Mikhail Laksin, Subhankar Chatterjee, Neil Young, Volker Linzer
  • Patent number: 6772683
    Abstract: The present invention is for a method and associated apparatus whereby low viscosity flexograhic printing inks having a viscosity controlling diluent are used in implementing wet trapping of sequentially applied ink layers by controlling the time between ink layer applications such that sufficient diluent evaporates from an applied layer to increase the first applied layer viscosity sufficiently to wet trap a subsequently applied superposed ink layer.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: August 10, 2004
    Assignee: Sun Chemical Corporation
    Inventors: Mikhail Laksin, Subhankar Chatterjee, Volker Linzer
  • Patent number: 6727295
    Abstract: Solvent-free, energy curable low viscosity gravure and non-conductive ink jet inks which contain a pigment; a rheological additive having the structure P—(U—Y)s, wherein P is the residue of an organic pigment or dye, Y is a polyalkylene oxide moiety, U is a linking moiety covalently bonding Y to P and s is an integer from 1 to 3; and an energy curable liquid vehicle which may be a cationic, thermal cationic or a free radical initiated polymerization system, cured by actinic radiation; and optionally containing a photoinitiating system.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: April 27, 2004
    Assignee: Sun Chemical Corporation
    Inventors: Mikhail Laksin, Subhankar Chatterjee, Russell J. Schwartz, Paul A. Merchak, Patrice Aurenty, Edward Stone, Gordon Kotora
  • Publication number: 20030154871
    Abstract: The present invention is for a method and associated apparatus whereby low viscosity flexograhic printing inks having a viscosity controlling diluent are used in implementing wet trapping of sequentially applied ink layers by controlling the time between ink layer applications such that sufficient diluent evaporates from an applied layer to increase the first applied layer viscosity sufficiently to wet trap a subsequently applied superposed ink layer.
    Type: Application
    Filed: February 19, 2002
    Publication date: August 21, 2003
    Inventors: Mikhail Laksin, Subhankar Chatterjee
  • Publication number: 20030134931
    Abstract: A method for producing a solvent resistant, low-extractable, film from an actinic radiation curable homogenous aqueous composition containing a water soluble compound, having at least one alpha, beta-ethylenically unsaturated radiation polymerizable double bond, and water as essential components.
    Type: Application
    Filed: December 27, 2002
    Publication date: July 17, 2003
    Inventors: Subhankar Chatterjee, Mikhail Laksin, David Biro, Jean Dominique Turgis
  • Patent number: 6559222
    Abstract: An aqueous polymer dispersion comprising a polymer substantially free of cationic polymerizable groups and a cationic photoinitiator, wherein the polymer is capable of being precipitated by an acid or base generating photoinitiator upon exposure to radiation and is optionally an energy curable polymer.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: May 6, 2003
    Assignee: Sun Chemical Corporation
    Inventors: John Rooney, Subhankar Chatterjee, Mikhail Laksin, Jean-Dominque Turgis
  • Patent number: 6489375
    Abstract: An Offset Lithographic Printing Process employing low VOC lithographic printing ink formulations containing monomeric diluents, curable by cationic polymerization in the presence of fountain solution and resin rheology modifiers compatible with cationic catalysts.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: December 3, 2002
    Assignee: Sun Chemical Corporation
    Inventors: Edward Stone, Gordon Kotora, Mikhail Laksin, Subhankar Chatterjee, Bhalendra J. Patel
  • Patent number: 6451873
    Abstract: Lithographic printing ink formulations compatible with cationic catalysts containing a diluent and rheology modifying resins curable by cationic polymerization in the presence of water or fountain solution.
    Type: Grant
    Filed: February 7, 2000
    Date of Patent: September 17, 2002
    Assignee: Sun Chemical Corporation
    Inventors: Edward Stone, Gordon Kotora, Mikhail Laksin, Subhankar Chatterjee, Bhalendra J. Patel
  • Publication number: 20020068772
    Abstract: Solvent-free, energy curable low viscosity gravure and non-conductive ink jet inks which contain a pigment; a rheological additive having the structure P—(U—Y)s, wherein P is the residue of an organic pigment or dye, Y is a polyalkylene oxide moiety, U is a linking moiety covalently bonding Y to P and s is an integer from 1 to 3; and an energy curable liquid vehicle which may be a cationic, thermal cationic or a free radical initiated polymerization system, cured by actinic radiation; and optionally containing a photoinitiating system.
    Type: Application
    Filed: February 27, 2001
    Publication date: June 6, 2002
    Inventors: Mikhail Laksin, Subhankar Chatterjee, Russell J. Schwartz, Paul A. Merchak, Patrice Aurenty, Edward Stone, Gordon Kotora
  • Publication number: 20020040073
    Abstract: An Offset Lithographic Printing Process employing low VOC lithographic printing ink formulations containing monomeric diluents, curable by cationic polymerization in the presence of fountain solution and resin rheology modifiers compatible with cationic catalysts.
    Type: Application
    Filed: September 20, 2001
    Publication date: April 4, 2002
    Inventors: Edward Stone, Gordon Kotora, Mikhail Laksin, Subhankar Chatterjee, Bhalendra J. Patel
  • Patent number: 6284816
    Abstract: Solvent-free, energy curable flexographic printing inks which contain a pigment; a rheological additive having the structure P-(U-Y)s, wherein P is the residue of an organic pigment or dye, Y is a polyalkylene oxide moiety, U is a linking moiety covalently bonding Y to P and s is an integer from 1 to 3; and an energy curable liquid vehicle which may be a ultraviolet cationic or a free radical initiated polymerization system, cured by actinic radiation; and optionally containing a photoinitiating system.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: September 4, 2001
    Assignee: Sun Chemical Corporation
    Inventors: Mikhail Laksin, Subhankar Chatterjee, Russell J. Schwartz, Paul A. Merchak
  • Patent number: 6127436
    Abstract: An organic oligomer binder produced by depolymerizing virgin, scrap, recycled or reclaimed polyethylene terephthalate via an alcoholysis reaction with branched glycols and esterifiing the resulting polyol oligomer with polybasic carboxylic acids and/or anhydrides.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: October 3, 2000
    Assignee: Sun Chemical Corporation
    Inventors: Subhankar Chatterjee, Albert A. Kveglis, Neil Young, Robert Kern, Thomas F. O'Malley, Bhalendra J. Patel