Patents by Inventor John F. Yanus

John F. Yanus 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).

  • Patent number: 6194111
    Abstract: A crosslinkable charge transport layer material for a photoconductor includes at least one poly(arylene ether alcohol), at least one polyisocyanate crosslinking agent and at least one charge transport material dispersed in a solvent. The crosslinkable charge transport layer material is crosslinked following application of the coating solution to the photoconductor. The photoconductor including such crosslinked charge transport layer exhibits excellent wear resistance so as to have long life, thereby reducing the cost of electrophotographic printing machines employing such photoconductors therein.
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: February 27, 2001
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Markus R. Silvestri, John F. Yanus, Damodar M. Pai, Paul J. De Feo, Dale S. Renfer, Anthony T. Ward, William W. Limburg, Harold F. Hammond, Robert W. Nolley
  • Patent number: 6177238
    Abstract: Disclosed is an ink jet printhead containing a polymer of the formula wherein P is a substituent which enables crosslinking of the polymer, a, b, c, and d are each integers of 0, 1, 2, 3, or 4, provided that at least one of a, b, c, and d is equal to or greater than 1 in at least some of the monomer repeat units of the polymer, A is or a mixture of wherein R is a hydrogen atom, an alkyl group, an aryl group, or mixtures thereof, B is one of specified groups, such as or mixtures thereof, and n is an integer representing the number of repeating monomer units.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: January 23, 2001
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, John F. Yanus, Damodar M. Pai, Markus R. Silvestri, Ram S. Narang, William W. Limburg, Dale S. Renfer
  • Patent number: 6174636
    Abstract: Disclosed is an imaging member which comprises a conductive substrate, a photogenerating material, and a binder comprising a polymer of the formula wherein A is or a mixture of wherein R is a hydrogen atom, an alkyl group, an aryl group, or mixtures thereof, B is one of specified groups, such as or mixtures thereof, and n is an integer representing the number of repeating monomer units.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: January 16, 2001
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, John F. Yanus, Damodar M. Pai, Markus R. Silvestri, Ram S. Narang, William W. Limburg, Dale S. Renfer
  • Patent number: 6139999
    Abstract: An electrophotographic imaging member includingat least one photographic imaging layer anda partially electrically conductive overcoat layer includingfinely divided charge injection enabling particles dispersed ina charge transporting continuous matrix including a cross linked polyamide, charge transport molecules and oxidized charge transport molecules, the continuous matrix being formed from a solution selected from the group includinga first solution includingcrosslinkable alcohol soluble polyamide containing methoxy methyl groups attached to amide nitrogen atoms,an acid having a pK.sub.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: October 31, 2000
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Paul J. DeFeo, Anthony T. Ward, Dale S. Renfer, Harold F. Hammond, Merlin E. Scharfe, Markus R. Silvestri, William W. Limburg
  • Patent number: 6132913
    Abstract: A crosslinkable coating composition including an alcohol soluble acrylated polyamide containing alkoxymethyl or alkoxyalkylmethyl groups attached to amide nitrogen atoms, a crosslinking catalyst and a mixture of a hydroxy functionalized aromatic diamine with a hydroxy functionalized triarylamine. A coating is formed from this composition.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: October 17, 2000
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, John F. Yanus, Damodar M. Pai, William W. Limburg, Markus R. Silvestri, Dale S. Renfer, Anthony T. Ward, Paul J. DeFeo, Harold F. Hammond, Robert W. Nolley
  • Patent number: 6132912
    Abstract: A photoconductive imaging member comprised of a supporting substrate, a layer (1) thereover, a photogenerating layer and a charge transport layer, and wherein said layer (1) is generated from a mixture of a polyhydroxyalkylacrylate, and an amino alkyltrialkoxysilane.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: October 17, 2000
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Markus R. Silvestri, Huoy-Jen Yuh, John S. Chambers, Harold F. Hammond, Susan M. Vandusen, Dennis J. Prosser, Kathleen M. Carmichael, Robert C. U. Yu, Neil S. Patterson
  • Patent number: 6127077
    Abstract: A photoreceptor having a substrate, including: (a) a charge generating layer; (b) a first charge transport layer having a first charge carrier mobility value; and (c) a second charge transport layer having a second charge carrier mobility value, wherein the first charge transport layer is closer to the charge generating layer than the second charge transport layer and the second charge transport layer is contiguous to the first charge transport layer, wherein the second charge carrier mobility value is higher than the first charge carrier mobility value.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: October 3, 2000
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, Chu-Heng Liu, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri
  • Patent number: 6117967
    Abstract: Disclosed is a polymer of the formula ##STR1## wherein A is ##STR2## or a mixture of ##STR3## wherein R is a hydrogen atom, an alkyl group, an aryl group, or mixtures thereof, B is one of specified groups, such as ##STR4## or mixtures thereof, and n is an integer representing the number of repeating monomer units.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: September 12, 2000
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, John F. Yanus, Damodar M. Pai, Markus R. Silvestri, Ram S. Narang, William W. Limburg, Dale S. Renfer
  • Patent number: 6107439
    Abstract: A conductive composition including a mixture of a reaction product ofa hole transporting hydroxy functionalized aryl amine,a hydroxy functionalized arylamine that is different from the hole transporting hydroxy functionalized aryl amine,a cross linkable polyamide, andand an acid capable of simultaneously cross linking the polyamide and oxidizing a portion of the hydroxy functionalized arylamine,the mixture of a reaction product includinga hole transporting hydroxy functionalized aryl amine andan oxidized hydroxy functionalized aryl amine in aa crosslinked polyamide matrix.Other embodiments including processes for applying the aforementioned composition and processes for using devices containing the compositions in high speed laser printing and related printing systems are also disclosed.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: August 22, 2000
    Assignee: Xerox Corporation
    Inventors: John F. Yanus, Damodar M. Pai, Timothy J. Fuller, Paul J. DeFeo, Markus R. Silvestri, Dale S. Renfer, William W. Limburg
  • Patent number: 6103436
    Abstract: An electrophotographic imaging member including a supporting substrate coated with at least photoconductive layer, a charge transport layer and an overcoating layer, the overcoating layer includinga hydroxy functionalized aromatic diamine anda hydroxy functionalized triarylamine dissolved or molecularly dispersed ina crosslinked polyamide matrix, the crosslinked polyamide prior to crosslinking being selected from the group consisting of materials represented by the following Formulae I and II: ##STR1## wherein: n is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100,000,R is an alkylene unit containing from 1 to 10 carbon atoms,between 1 and 99 percent of the R.sub.2 sites are --H, andthe remainder of the R.sub.2 sites are --CH.sub.2 --O--CH.sub.3, and ##STR2## wherein: m is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100000,R.sub.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: August 15, 2000
    Assignee: Xerox Corporation
    Inventors: John F. Yanus, Damodar M. Pai, Timothy J. Fuller, Paul J. DeFeo, Anthony T. Ward, Dale S. Renfer, William W. Limburg, Markus R. Silvestri, Harold F. Hammond, Robert W. Nolley
  • Patent number: 6099996
    Abstract: A flexible electrophotographic imaging member comprising a substrate and at least one imaging layer comprising a first charge transport material, free of long chain alkyl ester groups or long chain alkyl carboxyl groups, and a small amount of a different second charge transporting material containing only one long chain alkyl ester group dissolved or molecularly dispersed in a film forming binder, the at least one imaging layer having been formed by drying a coating comprising a solution of the first transporting material and second charge transporting material and the film forming polymer binder in a mixture of a low volatility solvent and a high volatility solvent. A method for fabricating this imaging member is also disclosed.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: August 8, 2000
    Assignee: Xerox Corporation
    Inventors: John F. Yanus, Damodar M. Pai, Timothy J. Fuller, Dale S. Renfer, William W. Limburg
  • Patent number: 6096470
    Abstract: A process for fabricating an electrophotographic imaging member includingforming a charge generating layer,forming an undried charge transport layer coating by applying to the charge generating layer a solution selected from either or both the group consisting ofa solution including a charge transport molecule, a first film forming binder and at least a first solvent anda solution including a charge transporting polymer and at least a first solvent,forming an undried overcoat layer coating by applying to the undried charge transport layer coating an overcoat layer coating solution including a second film forming polymer and at least a second solvent, the charge transport molecule and first film forming polymer or either or both a charge transporting polymer being substantially insoluble in the second solvent and the second polymer being substantially insoluble in the first solvent,applying heat to both the undried charge transport layer coating and the undried overcoat layer coating to migrate the first solve
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: August 1, 2000
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Anthony T. Ward, Harold F. Hammond, Merlin E. Scharfe, Paul J. DeFeo
  • Patent number: 6071659
    Abstract: An electrophotographic imaging member includinga substrate,a charge generating layer,a charge transport layer, andan overcoat layer includinga hole transporting hydroxy arylamine compound having at least two hydroxy functional groups,bis-(2-methyl-4-diethylaminophenyl)-phenylmethane anda cross linked polyamide film forming binder.A process for forming an overcoated imaging member is also disclosed.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: June 6, 2000
    Assignee: Xerox Corporation
    Inventors: Dale S. Renfer, Damodar M. Pai, Paul J. DeFeo, John F. Yanus, William W. Limburg, Timothy J. Fuller
  • Patent number: 6068960
    Abstract: A photoreceptor fabrication method including: (a) depositing a charge generating layer; (b) depositing a first charge transport layer having a first charge carrier mobility value; and (c) depositing a second charge transport layer having a second charge carrier mobility value that is different from the first charge carrier mobility value; wherein steps (a), (b), and (c) occur in any order, wherein the difference in the first charge carrier mobility value and the second charge carrier mobility value is accomplished by:(i) wherein the first charge transport layer includes a first binder and a first charge transport material and the second charge transport layer includes a second binder and a second charge transport material, selecting the first binder to have a lesser solubility limit for the first charge transport material than the solubility limit of the second binder for the second charge transport material; or(ii) wherein the first transport layer includes a first polymeric compound composed of a first char
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: May 30, 2000
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, Chu-Heng Liu, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri
  • Patent number: 6063533
    Abstract: An electrophotographic imaging member includinga supporting substrate,an undercoat layer,a charge generating layer comprisingphotoconductive pigment particles,film forming binder anda charge transport layer formed from a coating solution, the coating solution comprising charge transporting molecules, the charge transporting molecules comprising a major amount of a first charge transport molecule comprising an alkyl derivative of an arylamine and a minor amount of second transport molecule comprising an alkyloxy derivative of an arylamine.the charge generating layer being located between the substrate and the charge transport layer. A process for fabricating this imaging member is also disclosed.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: May 16, 2000
    Assignee: Xerox Corporation
    Inventors: John F. Yanus, Damodar M. Pai, Timothy J. Fuller, Dennis J. Prosser, Susan M. Vandusen
  • Patent number: 6025102
    Abstract: A flexible electrophotographic imaging member including a supporting substrate coated with at least one imaging layer comprising charge transport material free of long chain alkyl carboxylate groups and a small amount of a different second hole transporting material containing at least two long chain alkyl carboxylate groups dissolved or molecularly dispersed in a film forming binder and coated from a mixture of solvents containing low boiling component and a small concentration of high boiling solvent.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: February 15, 2000
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Merlin E. Scharfe, Paul J. DeFeo, Markus R. Silvestri
  • Patent number: 6020096
    Abstract: An electrophotographic imaging member comprising a charge generating layer comprising trigonal selenium particles and a charge transport layer, the charge transport layer includinga protonic acid or Lewis acid,a charge transporting small molecule,a film forming polymer, andpolyalkylene-block-polyethylene oxide.This imaging member may be fabricated using a suitable solvent for applying the charge transport layer.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: February 1, 2000
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Markus R. Silvestri, Damodar M. Pai, John F. Yanus, Raymond K. Crandall, Samuel Kaplan, Karen S. Garland
  • Patent number: 6004709
    Abstract: An allyloxymethylatedpolyamide composition is disclosed, the allyloxymethylatedpolyamide being represented by Formulae I and II: ##STR1## wherein: n is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100,000,R is an alkylene unit containing from 1 to 10 carbon atoms,between 1 and 99 percent of the R.sub.2 sites are --H, andbetween 1 and 99 percent of the R.sub.2 sites are --H, and the remainder of the R.sub.2 sites is between 25 percent and 99 percent --CH.sub.2 --O--(CH.sub.2).sub.w --CH.dbd.CH.sub.2, whereinw is 1, 2 or 3,between 1 and 75 percent of the R.sub.2 sites are --CH.sub.2 --O--R.sub.5, andR.sub.5 is an alkyl unit containing 1 to 4 carbon atoms, and ##STR2## wherein: m is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100,000,R.sub.1 and R are independently selected from the group consisting of alkylene units containing from 1 to 10 carbon atoms,between 1 and 99 percent of the R.sub.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: December 21, 1999
    Assignee: Xerox Corporation
    Inventors: Dale S. Renfer, William W. Limburg, Timothy J. Fuller, John F. Yanus, Damodar M. Pai, Robert W. Nolley, Paul J. DeFeo, Anthony T. Ward
  • Patent number: 5999780
    Abstract: Controllably conductive polymer compositions may be used in electrophotographic imaging developing systems, such as scavengeless or hybrid scavengeless systems or liquid image development systems. The conductive polymer compositions includes a charge-transporting material (particularly a charge-transporting, thiophene-containing polymer or an inert elastomeric polymer, such as a butadiene- or isoprene-based copolymer or an aromatic polyether-based polyurethane elastomer, that additionally comprises charge transport molecules) and a dopant capable of accepting electrons from the charge-transporting material. The invention also relates to an electrophotographic printing machine, a developing apparatus, and a coated transport member, an intermediate transfer belt, and a hybrid compliant photoreceptor comprising a composition of the invention.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: December 7, 1999
    Assignee: Xerox Corporation
    Inventors: Joseph Mort, Bing R. Hsieh, Mary A. Machonkin, Joseph Mammino, John F. Yanus
  • Patent number: 5985500
    Abstract: A photoreceptor composed of: (a) a substrate; (b) a blocking layer including a fluoroelastomer; (c) a charge generating layer including a binder material and a phthalocyanine; and (d) a charge transport layer.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: November 16, 1999
    Assignee: Xerox Corporation
    Inventors: Timothy J. Fuller, Markus R. Silvestri, Damodar M. Pai, John F. Yanus, Huoy-Jen Yuh, John S. Chambers, Ihor W. Tarnawskyj, Kock-Yee Law