Patents by Inventor C. Geoffrey Allen
C. Geoffrey Allen 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: 20080302271Abstract: A nanoscaled pigment particle composition includes an organic monoazo laked pigment including at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, wherein the functional moiety associates non-covalently with the functional group; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.Type: ApplicationFiled: June 7, 2007Publication date: December 11, 2008Applicant: XEROX CORPORATIONInventors: Rina CARLINI, C. Geoffrey Allen, Sandra J. Gardner, Karl W. Dawson, Peter G. Odell, Paul F. Smith, Jennifer L. Belelie
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Publication number: 20080306193Abstract: Radiation curable compositions, such as UV curable ink compositions, contain a polymeric dispersant, a curable material, and a nanoscale pigment particle composition including an organic monoazo laked pigment including at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, wherein the functional moiety of the pigment associates non-covalently with the functional group of the stabilizer; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.Type: ApplicationFiled: November 1, 2007Publication date: December 11, 2008Applicant: Xerox CorporationInventors: C. Geoffrey ALLEN, Rina CARLINI, Sandra J. GARDNER
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Publication number: 20080306189Abstract: Non-aqueous disperson compositions, such as ink compositions, contain a polymeric dispersant, a polymeric resin, an organic liquid, and a nanoscale pigment particle composition including an organic monoazo laked pigment including at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, wherein the functional moiety of the pigment associates non-covalently with the functional group of the stabilizer; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized pigment particles.Type: ApplicationFiled: November 1, 2007Publication date: December 11, 2008Applicant: XEROX CORPORATIONInventors: Rina CARLINI, C. Geoffrey ALLEN, Sandra J. GARDNER
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Publication number: 20080295731Abstract: A reactive ink set including three mixtures of radically polymerizable monomers. A first mixture includes a peroxide, a second mixture includes a peroxide decomposition agent, and an optional third mixture that does not include a peroxide or a peroxide decomposition agent. The first mixture and the second mixture polymerize to form a solid ink on the substrate following jetting in the liquid state.Type: ApplicationFiled: May 31, 2007Publication date: December 4, 2008Applicant: XEROX CORPORATIONInventors: Peter G. ODELL, Emily L. MOORE, Jennifer L. BELELIE, C. Geoffrey ALLEN
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Patent number: 7427324Abstract: A nanoscale pigment particle composition includes a quinacridone pigment having at least one functional moiety, and a sterically bulky stabilizer compound having at least one functional group, wherein the functional moiety associates non-covalently with the functional group; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, so as to afford nanoscale-sized particles of the pigment.Type: GrantFiled: November 1, 2007Date of Patent: September 23, 2008Assignee: Xerox CorporationInventors: Maria M. Birau, Rina Carlini, Karl W. Dawson, Sandra J. Gardner, C. Geoffrey Allen, Caroline M. Turek
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Patent number: 7427323Abstract: A nanoscale pigment particle composition includes a quinacridone pigment including at least one functional moiety, and a sterically bulky stabilizer compound including at least one functional group, wherein the functional moiety associates non-covalently with the functional group; and the presence of the associated stabilizer limits the extent of particle growth and aggregation, to afford nanoscale-sized particles.Type: GrantFiled: June 7, 2007Date of Patent: September 23, 2008Assignee: Xerox CorporationInventors: Maria M. Birau, Rina Carlini, C. Geoffrey Allen, Sandra J. Gardner, Karl W. Dawson, Peter G. Odell, Paul F. Smith, Caroline M. Turek, Roger E. Gaynor, Jeffrey H. Banning
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Patent number: 7407539Abstract: Disclosed is a phase change ink comprising (a) a colorant and (b) a phase change ink carrier, said carrier comprising (i) a branched triamide and (ii) a polyethylene wax having an average peak molecular weight of from about 350 to about 730, a polydispersity of from about 1.03 to about 3.0, and an asymmetrical molecular weight distribution skewed toward the high molecular weight end. Also disclosed is a process which comprises (1) incorporating into an ink jet printing apparatus a phase change ink comprising (a) a colorant and (b) a phase change ink carrier, said carrier comprising (i) a branched triamide and (ii) a polyethylene wax having an average peak molecular weight of from about 350 to about 730, a polydispersity of from about 1.03 to about 3.0, and an asymmetrical molecular weight distribution skewed toward the high molecular weight end; (2) melting the ink; and (3) causing droplets of the melted ink to be ejected in an imagewise pattern onto a substrate.Type: GrantFiled: November 30, 2005Date of Patent: August 5, 2008Assignee: Xerox CorporationInventors: Bo Wu, Stephan V. Drappel, Trevor J. Snyder, Donald R. Titterington, Jule W. Thomas, Jr., C Geoffrey Allen, Harold R. Frame, Wolfgang G. Wedler
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Publication number: 20080145777Abstract: Disclosed is a birefringent marking material comprising a vehicle for the marking material and birefringent nanoparticles having an average particle size of less than about 700 nm. The birefringent marking material, such as an ink or a toner, can be used to provide a security marking on or in an item, thereby enabling authentication of the item containing the image formed using the birefringent marking material.Type: ApplicationFiled: October 30, 2006Publication date: June 19, 2008Applicant: XEROX CORPORATIONInventors: Gabriel IFTIME, Peter M. KAZMAIER, C. Geoffrey ALLEN, Paul F. SMITH
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Publication number: 20080122914Abstract: Ink vehicles having improved gellant solubility and ink compositions including such ink vehicles are provided. Exemplary ink vehicles include first and second co-monomers, and a gellant that includes that includes a curable epoxy-polyamide composite gellant; in which the first and second co-monomers are radiation curable are different from each other. Additional exemplary ink vehicles include at least two chemically distinct gellants. The chemically distinct gellant materials include a first gellant that includes a curable epoxy-polyamide composite gellant, and a second gellant that includes an amide gellant. Methods for making and using these ink vehicles and ink compositions are also provided.Type: ApplicationFiled: August 23, 2006Publication date: May 29, 2008Applicant: XEROX CORPORATIONInventors: Eniko TOMA, Peter G. ODELL, C. Geoffrey ALLEN, Jennifer Lynne BELELIE
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Patent number: 7377971Abstract: Disclosed is a phase change ink comprising (a) a colorant and (b) a phase change ink carrier, said carrier comprising (i) a branched triamide and (ii) a polyethylene wax having an average peak molecular weight of from about 350 to about 730 and a polydispersity of from about 1.05 to about 3.0. Also disclosed is a process which comprises (1) incorporating into an ink jet printing apparatus a phase change ink comprising (a) a colorant and (b) a phase change ink carrier, said carrier comprising (i) a branched triamide and (ii) a polyethylene wax having an average peak molecular weight of from about 350 to about 730 and a polydispersity of from about 1.05 to about 3.0; (2) melting the ink; and (3) causing droplets of the melted ink to be ejected in an imagewise pattern onto a substrate.Type: GrantFiled: November 30, 2005Date of Patent: May 27, 2008Assignee: Xerox CorporationInventors: Bo Wu, Trevor J. Snyder, Stephan V. Drappel, Jule W. Thomas, Jr., Donald R. Titterington, C Geoffrey Allen
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Publication number: 20080098927Abstract: A pigmented phase change ink composition comprising an ink carrier, a dispersing agent, and pigment particles. The ink can be resistant to substantial aggregation and settling of the pigment particles in the melt and even when exposed to freeze thaw cycles.Type: ApplicationFiled: October 26, 2006Publication date: May 1, 2008Applicant: XEROX CORPORATIONInventors: C. Geoffrey ALLEN, Adela GOREDEMA, Stephan V. DRAPPEL, Neha KHARBANDA, Caroline M. Turek, Eniko TOMA, Christopher A. WAGNER
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Publication number: 20080087190Abstract: Disclosed is a phase change ink containing a fluorescent colorant that upon exposure to activating energy fluoresces such that an image that was not visible prior to exposure to the activating energy becomes visible. Also disclosed are an ink jet system and a process for authenticating a color document using the disclosed phase change ink.Type: ApplicationFiled: October 12, 2006Publication date: April 17, 2008Applicant: XEROX CORPORATIONInventors: Gabriel IFTIME, Christopher A. WAGNER, C. Geoffrey ALLEN, Peter M. KAZMAIER, Peter G. ODELL, Paul F. SMITH
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Publication number: 20080000384Abstract: Radiation curable phase change ink comprising an ink vehicle that includes at least one curable carrier, at least one gellant, at least one curable wax and at least one photoinitiator. In a method of forming an image with the ink, the radiation curable phase change ink is melted, then jetted onto an image receiving substrate, wherein the radiation curable phase change ink forms a gel state, and exposed to ultraviolet light to cure the curable components of the radiation curable phase change ink. The wax cures into the structure of the ink, thereby generating a robust image of excellent gloss.Type: ApplicationFiled: June 28, 2006Publication date: January 3, 2008Applicant: XEROX CORPORATIONInventors: Jennifer L. BELELIE, Peter G. ODELL, Eniko TOMA, Christopher A. WAGNER, C. Geoffrey ALLEN, Stephan V. DRAPPEL
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Patent number: 6864026Abstract: A photoconductive imaging member comprised of an optional supporting substrate, an optional blocking layer, a photogenerating layer, and a charge transport layer, and wherein said charge transport layer comprises a crosslinked polycarbonate component containing a repeating segment of the formula wherein R1 is selected from the group consisting of hydrogen, alkyl with from about 1 to about 15 carbons optionally further containing one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, silicon, and phosphorus, or aryl; R2 represents a divalent linkage; Ar3 and Ar4 each independently represent aromatic groups; R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, and aryl; and optionally wherein R3 and R4 form a combined ring structure; and wherein x and y represent the mole fractions of the repeating segments.Type: GrantFiled: March 14, 2003Date of Patent: March 8, 2005Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen
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Patent number: 6858070Abstract: Disclosed is an ink composition comprising (a) an ink carrier which comprises a monoamide, a tetra-amide, or a mixture thereof; (b) a polyalkylene succinimide; and (c) pigment particles. Also disclosed is an ink composition comprising (a) an ink carrier, (b) a polyalkylene succinimide, and (c) pigment particles, said ink having a conductivity great than 1×10?8 Siemens per centimeter. Also disclosed is an ink set comprising (1) a first ink comprising (a) an ink carrier, (b) a polyalkylene succinimide, and (c) pigment particles, and (2) a second ink comprising a dye colorant and a second ink carrier, wherein the first ink carrier contains substantially the same components as the second ink carrier.Type: GrantFiled: November 25, 2003Date of Patent: February 22, 2005Assignee: Xerox CorporationInventors: Raymond W. Wong, Stephan V. Drappel, Paul F. Smith, C. Geoffrey Allen, Caroline M Turek
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Patent number: 6844416Abstract: A polycarbonate comprised of a repeating unit represented by Formula (I) with R1, R2, R3 and R4 being, for example, alkyl; Ar being, for example, aryl; and m representing the number of groups.Type: GrantFiled: May 2, 2003Date of Patent: January 18, 2005Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen
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Patent number: 6818366Abstract: A photoconductive imaging member comprised of an optional supporting substrate, an optional blocking layer, a photogenerating layer, and a charge transport layer, and a SiO3 containing polycarbonate component.Type: GrantFiled: March 14, 2003Date of Patent: November 16, 2004Assignee: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen
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Publication number: 20040220372Abstract: A polycarbonate comprised of a repeating unit represented by Formula (I) 1Type: ApplicationFiled: May 2, 2003Publication date: November 4, 2004Applicant: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen
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Publication number: 20040185359Abstract: A photoconductive imaging member comprised of an optional supporting substrate, an optional blocking layer, a photogenerating layer, and a charge transport layer, and a SiO3 containing polycarbonate component.Type: ApplicationFiled: March 14, 2003Publication date: September 23, 2004Applicant: Xerox CorporationInventors: Yu Qi, Nan-Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen
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Publication number: 20040185360Abstract: A photoconductive imaging member comprised of an optional supporting substrate, an optional blocking layer, a photogenerating layer, and a charge transport layer, and wherein said charge transport layer comprises a crosslinked polycarbonate component containing a repeating segment of the formula 1Type: ApplicationFiled: March 14, 2003Publication date: September 23, 2004Applicant: Xerox CorporationInventors: Yu Qi, Nan Xing Hu, H. Bruce Goodbrand, Paul F. Smith, C. Geoffrey Allen