Patents by Inventor Lokendra Pal
Lokendra Pal 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).
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Publication number: 20150050435Abstract: In one example, a print medium includes pigment particles sized less than a hundred nanometers and frictional control additives. An undercoating is disposed between the base material and top coating. The undercoat includes a first sub-layer comprising a pigment fixative agent and a second sub-layer comprising a dye fixative agent The top coating forms a protective and low friction coating over the undercoating.Type: ApplicationFiled: April 17, 2012Publication date: February 19, 2015Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Lokendra Pal, Xulong Fu, Julio Cesar Alonso
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Publication number: 20150035926Abstract: The present disclosure is drawn to coated media substrates, as well as related systems and methods. In one example, a coated media substrate for inkjet ink printing can comprise an ink-receiving layer coated on at least one side of a substrate, and can be formulated for accepting an inkjet ink composition. The ink-receiving layer can comprise an optical brightening agent, an organic acid salt, a binder, a pigment, and a low-molecular weight polymeric carrier having a weighted average molecular weight less than 50,000 Mw.Type: ApplicationFiled: December 20, 2011Publication date: February 5, 2015Applicant: Hewlett-Packard Development Company, L.P.Inventors: Lokendra Pal, Xulong Fu, Xiaoqi Zhou, Ronald J. Selensky
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Publication number: 20150024181Abstract: A graphics medium may have an ink receiving layer with at least fifty percent hyrogel by weight and an opacity control layer with a polymer embedded with at least one filler material.Type: ApplicationFiled: March 27, 2012Publication date: January 22, 2015Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Xulong Fu, Christine E. Steichen, Lokendra Pal
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Publication number: 20150007749Abstract: Described herein is a composition that can be used for treating media. The composition includes an organosilane treated water dispersible organic acid salt, a water soluble organic acid salt, a chelating agent, and an optical brightening agent.Type: ApplicationFiled: February 10, 2012Publication date: January 8, 2015Inventors: Lokendra Pal, Xulong Fu, Xiaogi Zhou
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Patent number: 8927074Abstract: A method of producing inkjet media (170) includes dissolving heptahydrate epsomite in a coating solution comprising at least one surface sizing additive, coating at least one side of a substrate with the coating solution to produce the inkjet media (170). An inkjet medium (170) includes a substrate (172) and a coating layer (174) comprising heptahydrate epsomite deposited on a first side of the substrate, the coating layer (174) having a substantially uniform distribution of heptahydrate epsomite throughout its volume.Type: GrantFiled: February 22, 2011Date of Patent: January 6, 2015Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xulong Fu, Xiaoqi Zhou, Lokendra Pal
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Patent number: 8916243Abstract: A graphic medium and a method of making same employs a paper core having a normalized opacity within a range of about 0.15 to about 0.4 percent/grams per square meter. The graphic medium includes a first material layer on a first side of the paper core and a second material layer on one or both of the first side between the paper core and the first material layer and a second, opposite side of the paper core. The graphic medium has a translucent opacity between about 40% and about 90%. The method includes mechanically refining a mixture of wood fibers until a paper substrate is formed having the normalized opacity. The paper substrate is calendered using a paper making machine and the first and second material layers are applied to form the graphic medium.Type: GrantFiled: January 31, 2011Date of Patent: December 23, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xulong Fu, Lokendra Pal, Ronald J Selensky
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Patent number: 8846798Abstract: A post-treatment solution for digital inkjet printing includes a thermoplastic material having a melting temperature ranging from about 40° C. to about 250° C., a binder, and a liquid carrier. The thermoplastic material and the binder are present in a weight ratio ranging from 100:1 to 1:1. A print medium, printing method, and printing system are also disclosed herein.Type: GrantFiled: November 16, 2012Date of Patent: September 30, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xulong Fu, Lokendra Pal, Xiaoqi Zhou
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Publication number: 20140209263Abstract: An uncoated recording medium includes a blend of hardwood and softwood chemical pulp fibers, and thermomechanical pulp (TMP) fibers, with total fiber content at least 80 wt % of the medium's total wt %. Hardwood fibers range from about 20 wt % to about 70 wt %, softwood fibers range from about 30 wt % to about 50 wt %, and TMP fibers range from about 10 wt % to about 30 wt %, all relative to the total fiber content. A TiO2 amount ranges from about 1.5 wt % to about 6 wt % of the total wt %, and a bivalent or multivalent salt amount ranges from about 6,000 to about 16,000 ?g/gram of the medium. The basis weight ranges from about 45 g/m2 to about 63 g/m2.Type: ApplicationFiled: October 29, 2013Publication date: July 31, 2014Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, LP.Inventors: John L. Stoffel, Thomas Roger Oswald, Xulong Fu, Lokendra Pal, Silke Courtenay
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Patent number: 8771825Abstract: A sheet of photo paper comprises a substrate, a top coat deposited on the image receiving side of the substrate, a polyethylene coating deposited on the top coat, and an image receiving coating deposited on the polyethylene coating. A method of making a sheet of photo paper, comprising layering a pre-coat onto a substrate, layering a top coat onto the pre-coat, layering a polyethylene coating onto the top coat, and layering an image receiving coating onto the polyethylene coating.Type: GrantFiled: October 29, 2010Date of Patent: July 8, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Xulong Fu, Christine E. Steichen, Lokendra Pal, Ronald J. Selensky
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Publication number: 20140139601Abstract: An inkjet recording medium includes a substrate, an intermediate layer disposed on the substrate, and an ink receiving layer disposed on the intermediate layer. The intermediate layer includes a binder, an inorganic pigment, and a pigment ink fixing agent chosen from divalent salts, multivalent salts, and combinations thereof. The ink receiving layer includes a non-film forming polymer, a binder chosen from any of water dispersible binders or water soluble binders, and a pigment.Type: ApplicationFiled: July 22, 2011Publication date: May 22, 2014Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, LP.Inventors: Lokendra Pal, Xulong Fu, Ronald J. Selensky
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Publication number: 20140141212Abstract: A post-treatment solution for digital inkjet printing includes a thermoplastic material having a melting temperature ranging from about 40° C. to about 250° C., a binder, and a liquid carrier. The thermoplastic material and the binder are present in a weight ratio ranging from 100:1 to 1:1. A print medium, printing method, and printing system are also disclosed herein.Type: ApplicationFiled: November 16, 2012Publication date: May 22, 2014Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Xulong Fu, Lokendra Pal, Xiaoqi Zhou
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Patent number: 8714737Abstract: The present disclosure is drawn to a coated print medium, a method of preparing a print medium, and a printing system. The coated print medium includes a substrate and a coating applied to the substrate at coat weight from 1 gsm to 6 gsm. The coating include, by solids, 20 wt % to 90 wt % of non-film forming polymer particulates having a particle size from 50 nm to 300 nm and a glass transition temperature greater than 85.degree. C.; 1 wt % to 25 wt % water soluble polymer binder; 0.1 wt % to 5 wt % fixing agent; and 0.1 wt % to 10 wt % slip aid.Type: GrantFiled: March 14, 2011Date of Patent: May 6, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Lokendra Pal, Xulong Fu
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Patent number: 8709555Abstract: A media for digital high speed inkjet web press printing has a CD residual tensile energy absorption index greater than 300 J/Kg. The media includes a paper base having a MD/CD tensile stiffness index ratio of less than 2.0 and a tensile energy absorption index of greater than 500 J/Kg. The paper base includes a mixture of fibers having a softwood fiber to hardwood fiber ratio within a range of 3 to 7 to 7 to 1, an internal starch having a cationic starch to fiber ratio greater than 1.0%, and a filler within a range of about 1.0% to about 12.0% of paper base weight. The media further includes an image receiving coating on a side of the paper base.Type: GrantFiled: April 28, 2011Date of Patent: April 29, 2014Assignee: Hewlett-Packard Development Company, L.P.Inventors: Lokendra Pal, Jason Swei, Glenn T. Gentile, Sandeep K. Bangaru
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Publication number: 20140044896Abstract: A media for digital high speed inkjet web press printing has a CD residual tensile energy absorption index greater than 300 J/Kg. The media includes a paper base having a MD/CD tensile stiffness index ratio of less than 2.0 and a tensile energy absorption index of greater than 500 J/Kg. The paper base includes a mixture of fibers having a softwood fiber to hardwood fiber ratio within a range of 3 to 7 to 7 to 1, an internal starch having a cationic starch to fiber ratio greater than 1.0%, and a filler within a range of about 1.0% to about 12.0% of paper base weight. The media further includes an image receiving coating on a side of the paper base.Type: ApplicationFiled: April 28, 2011Publication date: February 13, 2014Inventors: Lokendra Pal, Jason Swei, Glenn T. Gentile, Sandeep K. Gangaru
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Publication number: 20130323440Abstract: A method of producing inkjet media (170) includes dissolving heptahydrate epsomite in a coating solution comprising at least one surface sizing additive, coating at least one side of a substrate with the coating solution to produce the inkjet media (170). An inkjet medium (170) includes a substrate (172) and a coating layer (174) comprising heptahydrate epsomite deposited on a first side of the substrate, the coating layer (174) having a substantially uniform distribution of heptahydrate epsomite throughout its volume.Type: ApplicationFiled: February 22, 2011Publication date: December 5, 2013Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Xulong Fu, Xiaoqi Zhou, Lokendra Pal
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Publication number: 20130306259Abstract: A graphic medium and a method of making same employs a paper core having a normalized opacity within a range of about 0.15 to about 0.4 percent/grams per square meter. The graphic medium includes a first material layer on a first side of the paper core and a second material layer on one or both of the first side between the paper core and the first material layer and a second, opposite side of the paper core. The graphic medium has a translucent opacity between about 40% and about 90%. The method includes mechanically refining a mixture of wood fibers until a paper substrate is formed having the normalized opacity. The paper substrate is calendered using a paper making machine and the first and second material layers are applied to form the graphic medium.Type: ApplicationFiled: January 31, 2011Publication date: November 21, 2013Inventors: Xulong Fu, Lokendra Pal, Ronald J. Selensky
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Publication number: 20130216737Abstract: A sheet of photo paper comprises a substrate, a top coat deposited on the image receiving side of the substrate, a polyethylene coating deposited on the top coat, and an image receiving coating deposited on the polyethylene coating. A method of making a sheet of photo paper, comprising layering a pre-coat onto a substrate, layering a top coat onto the pre-coat, layering a polyethylene coating onto the top coat, and layering an image receiving coating onto the polyethylene coating.Type: ApplicationFiled: October 29, 2010Publication date: August 22, 2013Applicant: Hewlett-Packard Development Company, L.P.Inventors: Xulong Fu, Christine E. Steichen, Lokendra Pal, Ronald J . Selensky
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Publication number: 20130201251Abstract: A photo media may comprise a substrate, the substrate having an image receiving side and a non-image receiving side, an extruded barrier layer disposed on the non-image receiving side of the substrate, and a laminate layer disposed on the image receiving side of the substrate after an ink layer is printed. The photo media may further comprise an image receiving layer disposed on the image receiving side of the substrate between the substrate and the laminate layer.Type: ApplicationFiled: October 29, 2010Publication date: August 8, 2013Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Lokendra Pal, Xulong Fu, Christine E. Steichen
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Patent number: 8449665Abstract: Media coating composition and inkjet recording media including it. An example composition includes a total solid content ranging from about 10 to about 65 weight percent by total weight of the composition. The solid content includes from about 80 to about 99 weight percent of insoluble starch nanoparticles having a particle size ranging from about 50 to about 300 nm and from about 1 to about 20 weight percent of fillers by total weight of the solid content. A disclosed example inkjet recording media includes a supporting substrate, and the coating composition disposed on the substrate.Type: GrantFiled: January 8, 2010Date of Patent: May 28, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: Lokendra Pal, Kali M. Campbell
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Publication number: 20130095333Abstract: A method of forming a surface treated medium in which a surface treatment solution is formed comprising a number of water soluble, multi-valent salts, a number of water dispersible, multi-valent salts, a binder that binds the water dispersible, multi-valent salts to a medium and to the elements within the surface treatment solution, and an organosilane, and the surface treatment solution is applied to a medium. A surface treatment solution comprises a number of water soluble, multi-valent, organic acid salts, a number of water dispersible, multi-valent, organic acid salts, a binder that binds the water dispersible, multi-valent, organic acid salts to a medium and to the elements within the surface treatment solution, and an organosilane.Type: ApplicationFiled: October 14, 2011Publication date: April 18, 2013Inventors: Lokendra Pal, Xulong Fu, Xiaoqi Zhou, Ronald J. Selensky