Patents by Inventor David S. Weiss
David S. Weiss 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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Patent number: 6593046Abstract: Disclosed are photoconductive elements including a conductive support, e.g., an electrically conductive film, drum, or belt, on which a negatively chargeable photoconductive layer is disposed. An electrical barrier layer is disposed between the conductive support and the photoconductive layer. The barrier layer provides a high energy barrier to the injection of positive charges, but transports electrons under an applied electric field. In embodiments, the barrier layer can transport charge by electronic, or both electronic and ionic mechanisms, and, is not substantially affected by humidity changes. The barrier layer includes a polyester-co-imides, polyesterionomer-co-imides, or polyamide-co-imides having covalently bonded as repeat units in the polymer chain, aromatic tetracarbonylbisimide groups of the formula: wherein Ar1 and Ar2 respectively represent tetravalent or trivalent aromatic groups of 6 to about 20 carbon atoms, and X is O, C(CF3)2, S═O or SO2.Type: GrantFiled: September 18, 2001Date of Patent: July 15, 2003Assignee: Heidelberger Druckmaschinen AGInventors: Louis J. Sorriero, Michel F. Molaire, Marie B. O'Regan, Wayne T. Ferrar, David S. Weiss, Jane Robin Cowdery
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Publication number: 20030054270Abstract: A multi-active electrophotographic charge generation element comprises a conductive support, a charge generation layer (CGL) disposed on the conductive support, and a charge transport layer (CTL) disposed on the charge generation layer. The charge generation layer (CGL) includes a charge-generation material comprising an aggregated or crystalline form of a first dye or pigment and a first polymeric binder. The charge transport layer (CTL) comprises at least one charge-transport agent, a second dye or pigment having absorption in a selected spectral region that at least partially overlaps the absorption of a dissolved non-aggregated or non-crystalline form of the first dye or pigment, and a second polymeric binder. The second dye or pigment in the charge transport layer absorbs radiation in the selected spectral region that is incident on the charge transport layer, thereby shielding the charge generation layer from that radiation and mitigating visible radiation-induced photofatigue.Type: ApplicationFiled: July 22, 2002Publication date: March 20, 2003Inventors: Albert V. Buettner, Dennis R. Fronheiser, Anne F. Lairmore, David S. Weiss, Jeffrey R. Murray, Marie B. O'Regan
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Publication number: 20020155365Abstract: Disclosed are photoconductive elements including a conductive support, e.g., an electrically conductive film, drum, or belt, on which a negatively chargeable photoconductive layer is disposed. An electrical barrier layer is disposed between the conductive support and the photoconductive layer. The barrier layer provides a high energy barrier to the injection of positive charges, but transports electrons under an applied electric field. In embodiments, the barrier layer can transport charge by electronic, or both electronic and ionic mechanisms, and, is not substantially affected by humidity changes.Type: ApplicationFiled: September 18, 2001Publication date: October 24, 2002Inventors: Louis J. Sorriero, Michel F. Molaire, Marie B. O'Regan, Wayne T. Ferrar, David S. Weiss, Jane Robin Cowdery
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Patent number: 6187491Abstract: Electrophotographic charge generating elements comprise a solid electrolyte layer having improved image discrimination. The solid electrolyte layer includes a complex of a silsesquioxane and a charge carrier, and further includes nondiffusible acid scavengers in an amount of at least 0.2 weight %. The acid scavengers are nondiffusible tertiary arylamines having a pKa of at least 4.Type: GrantFiled: February 8, 1999Date of Patent: February 13, 2001Assignee: Eastman Kodak CompanyInventors: Wayne T. Ferrar, J. Robin Cowdery, William T. Gruenbaum, David S. Weiss
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Patent number: 6066425Abstract: Electrophotographic charge generating elements comprise a solid electrolyte layer having improved image discrimination and layer adhesion. The solid electrolyte layer includes a complex of a silsesquioxane and a charge carrier, and is adhered to an underlying photoconductor layer using a primer layer that includes specific addition polymers. This primer layer has a resistivity of at least 10.sup.10 ohms/square and contains substantially no free ACTIVE moieties as defined herein. Such groups, when present in the primer layer, appear to reduce image discrimination.Type: GrantFiled: December 30, 1998Date of Patent: May 23, 2000Assignee: Eastman Kodak CompanyInventors: Wayne T. Ferrar, Louis J. Sorriero, J. Robin Cowdery, David S. Weiss
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Patent number: 5882830Abstract: A photoconductive element comprising: an electrically conductive base; at least one active layer comprising an organic material, said at least one active layer being capable of charge generation and charge transport; and an outermost multilayer protective overcoat comprising at least one sol-gel layer and at least one outermost diamond-like carbon layer comprising fluorine.Type: GrantFiled: April 30, 1998Date of Patent: March 16, 1999Assignee: Eastman Kodak CompanyInventors: Susan A. Visser, Robin J. Cowdery-Corvan, David S. Weiss
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Patent number: 5780192Abstract: A multiactive photoconductive element exhibiting reduced black spots in discharged area development systems. The element includes (A) a conductive layer, (B) an aggregate charge generation layer in direct physcial contact with the conductive layer and (C) a charge transport layer. The charge generation layer contains (i) a binder an adhesive polymer. The charge transport layer contains a binder according to formula II: ##STR1## wherein the Ar, R.sup.1, R.sup.2, R.sup.7, R.sup.8, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.9, R.sup.10, R.sup.11, and R.sup.12 and x are defined in the specification.Type: GrantFiled: February 13, 1997Date of Patent: July 14, 1998Assignee: Eastman Kodak CompanyInventors: Marie B. O'Regan, Anne F. Lairmore, Jeffrey R. Murray, Louis J. Sorriero, Albert V. Buettner, David S. Weiss
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Patent number: 5759496Abstract: The instant invention is directed at an apparatus for removing VOC's from an exhaust gas stream comprised of the following: a heatable adsorber located in the exhaust stream capable of desorption; and, an oxidizer structure having a lightoff temperature and located in the exhaust stream downstream from the adsorber structure. One particular embodiment of the apparatus comprises the following two elements: (1) a resistively heatable adsorber possessing an activated carbon phase located in the exhaust stream and having a desorption temperature; and, (2) an electrically heatable catalyst structure having a lightoff temperature and located in the exhaust stream downstream from the adsorber structure.The method enabled as a result of the development of the aforementioned apparatus, i.e.Type: GrantFiled: December 21, 1995Date of Patent: June 2, 1998Assignee: Corning IncorporatedInventors: David L. Hickman, Timothy V. Johnson, David S. Weiss
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Patent number: 5597503Abstract: A metal honeycomb heating element is protectively mounted in an enclosure comprising a one-piece enclosure wall, the heater being supported between a circumferential support member and a circumferential compression ring attached to the enclosure wall. A diametrically balanced compressive force is maintained on the edges of the heating element by the compression ring and support, this force operating to significantly extend the life of the heater element under hot vibration. Heater slot separators and electrode feedthrough structures for extending the life of the heater element are also provided.Type: GrantFiled: June 2, 1995Date of Patent: January 28, 1997Assignee: Corning IncorporatedInventors: James G. Anderson, Thomas A. Collins, Leslie E. Hampton, G. Daniel Lipp, Alfred N. Mack, David S. Weiss
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Patent number: 5487865Abstract: A complex body and method of making same which includes forming an assembly of green bodies, each body having an inlet end and an outlet end and having a multiplicity of cells extending from inlet to outlet end, and sintering the assembly at a temperature and time sufficient to cause interdiffusion of the metals between the bodies to join them and form the complex body.Type: GrantFiled: September 2, 1994Date of Patent: January 30, 1996Assignee: Corning IncorporatedInventors: Leslie E. Hampton, David S. Weiss
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Patent number: 5427601Abstract: A sintered metal body is disclosed of composition consisting essentially of in weight percent about 5 to 40 Cr, about 2 to 30 Al, 0 to about 5 special metal, 0 to about 4 rare earth oxide additive, and the balance Fe group metal and unavoidable impurities,the composition including at least one component selected from component A and/or component B, component A being special metal, and component B being at least an effective amount of rare earth oxide additive,the special metal being a first special metal component, and optionally, a second special metal component when rare earth oxide additive is 0, the first special metal component consisting of at least one of: Y, lanthanides, Zr, Hf, Ti, Si, and B, and the second special metal component consisting of at least one of: alkaline earth metal, Cu, and Sn, and the special metal being a third special metal component when rare earth oxide additive is >0, the third special metal component consisting of at least one of Y, lanthanides, Zr, Hf, Ti, Si, alkaline earType: GrantFiled: September 30, 1991Date of Patent: June 27, 1995Assignees: NGK Insulators, Ltd., Corning Inc.Inventors: Takashi Harada, Yoshihiro Fujiwara, Fumio Abe, Tsuneaki Ohashi, Hiroshige Mizuno, Kevin R. Brundage, Srinivas H. Swaroop, David F. Thompson, Raja R. Wusirika, David S. Weiss
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Patent number: 5409660Abstract: A release agent for producing sintered metal parts using the release agent. The method includes applying a release agent to contacting surfaces of at least two green metal parts, forming an assembly of the parts, sintering the assembly, and separating the parts which are in contact with the release agent. The release agent is a mixture of alumina and a vehicle having a vaporization temperature of less than about 100.degree. C. at atmospheric pressure, and is nonreactive with the alumina and the green metal parts. When at least one of the parts having a contacting surface is a honeycomb structure, the median particle diameter of the alumina is no greater than about 3 micrometers.Type: GrantFiled: April 8, 1993Date of Patent: April 25, 1995Assignee: Corning IncorporatedInventors: Christopher G. Alpha, Leslie E. Hampton, David S. Weiss
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Patent number: 5382005Abstract: Methods and apparatus for protecting extruded metal powder green bodies (34) during firing are provided. In certain embodiments, one or more green bodies (34) are housed in a non-gas tight chamber (13) located in the hot zone (24) of a cold-wall vacuum/atmosphere furnace (10). Furnace gas, e.g., hydrogen, is supplied to the interior of the chamber (13). The resulting one-way flow out of the chamber (13) protects the green bodies (34) from the backflow of burn-out products, as well as from contaminants arising from the walls and internal components of the furnace (10). In other embodiments, green bodies (34) are housed in individual non-gas tight containers (36). The containers (36) minimize the amount of furnace gas which comes into contact with the green bodies (34) during sintering and thus minimize the level of exposure of the green bodies (34) to oxidative impurities in the furnace gas. When composed of the same material as the green bodies, the containers (36) also perform a getter function.Type: GrantFiled: May 12, 1993Date of Patent: January 17, 1995Assignee: Corning IncorporatedInventor: David S. Weiss
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Patent number: 5225155Abstract: Methods and apparatus for protecting extruded metal powder green bodies (34) during firing are provided. In certain embodiments, one or more green bodies (34) are housed in a non-gas tight chamber (13) located in the hot zone (24) of a cold-wall vacuum/atmosphere furnace (10). Furnace gas, e.g., hydrogen, is supplied to the interior of the chamber (13). The resulting one-way flow out of the chamber (13) protects the green bodies (34) from the backflow of burn-out products, as well as from contaminants arising from the walls and internal components of the furnace (10). In other embodiments, green bodies (34) are housed in individual non-gas tight containers (36). The containers (36) minimize the amount of furnace gas which comes into contact with the green bodies (34) during sintering and thus minimize the level of exposure of the green bodies (34) to oxidative impurities in the furnace gas. When composed of the same material as the green bodies, the containers (36) also perform a getter function.Type: GrantFiled: July 22, 1991Date of Patent: July 6, 1993Assignee: Corning IncorporatedInventors: Leslie E. Hampton, David S. Weiss
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Patent number: 5194719Abstract: Novel method and structure is disclosed for strengthening and mounting sloted metallic honeycomb structures by positioning rod members within the slots to prevent the slots from closing or deforming, and by utilizing the rod members to precisely engage positionable restraining inserts of an enclosing housing, so as to accurately mount the honeycomb structure within the housing.Type: GrantFiled: April 13, 1992Date of Patent: March 16, 1993Assignee: Corning IncorporatedInventors: Gregory A. Merkel, Lawrence S. Rajnik, David F. Thompson, David S. Weiss
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Patent number: 5190840Abstract: An improved reusable multiactive electrophotographic element has a charge-transport layer comprising a triarylamine charge-transport material in a binder comprising a polyester containing recurring units having the structure ##STR1##Type: GrantFiled: August 22, 1991Date of Patent: March 2, 1993Assignee: Eastman Kodak CompanyInventors: David S. Weiss, Paul D. Yacobucci, Hsinjin Yang
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Patent number: 5154787Abstract: Highly uniform prepreg mats comprising inorganic fibers and powered ceramic matrix materials, useful for the manufacture of ceramic matrix composite articles, are provided by a process wherein continuous fiber tows infiltrated with a thermoplastic suspension of the matrix powder are preheated, uniformly collected on a heated drum or other support, and then cooled and compacted with a pressure roller or the like to achieve a prepreg mat structure characterized by a homogeneous distribution of fibers and ceramic matrix material.Type: GrantFiled: November 1, 1990Date of Patent: October 13, 1992Assignee: Corning IncorporatedInventors: Robert W. Gardner, Constance B. Sawyer, Ronald L. Stewart, David S. Weiss
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Patent number: 5135828Abstract: An improved reusable multiactive electrophotographic element has a charge-transport layer comprising a triarylamine charge-transport material in a binder comprising a polymer containing recurring units having the structure ##STR1##Type: GrantFiled: August 22, 1991Date of Patent: August 4, 1992Assignee: Eastman Kodak CompanyInventors: Hsinjin Yang, David S. Weiss, Scott E. Tunney
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Patent number: 5112935Abstract: The invention provides a polyester containing recurring units having the structure ##STR1## which is especially useful as a binder in a triarylamine-containing charge-transport layer of an electrophotographic element.Type: GrantFiled: August 22, 1991Date of Patent: May 12, 1992Assignee: Eastman Kodak CompanyInventors: Paul D. Yacobucci, Hsinjin Yang, David S. Weiss
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Patent number: H1607Abstract: An improved reusable multiactive electrophotographic element has a charge-transport layer comprising a triarylamine charge-transport material in a binder comprising a polyester containing recurring units having the structure ##STR1##Type: GrantFiled: August 22, 1991Date of Patent: November 5, 1996Assignee: Eastman Kodak CompanyInventors: Hsinjin Yang, Paul D. Yacobucci, David S. Weiss