Patents by Inventor Derek Henderson
Derek Henderson 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: 6890301Abstract: A diagnostic ultrasonic imaging system includes a scanhead having a plurality of transducer elements. A signal combiner, such a time-division multiplexer or a frequency-division multiplexer, is coupled to each of the transducer elements. The signal combiner combines the signals from the transducer elements into a composite signal and couples the composite signal to an ultrasonic processor through a wire or other communication link. A signal separator, such as a time-division demultiplexer or a frequency-division demultiplexer, is coupled to the link and recovers from the composite signal each of the signals from the transducer elements.Type: GrantFiled: March 5, 2002Date of Patent: May 10, 2005Assignee: Koninklijke Philips Electronics NVInventors: James Jago, Gary Schwartz, Derek Henderson, Malcolm Harnois, John Stice, Doug Maxwell
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Patent number: 6695783Abstract: A digital multiline beamformer is provided which produces multiple receive beams in response to a single transmit event. An embodiment of the present invention includes a bulk delay which provides a common steering delay applicable to all of the beams received at one time. The bulk delay is succeeded by parallel filter processing paths which produce finely focused multiple beams simultaneously. In one embodiment a multiphase filter produces the samples for multiple beams, which is advantageous when the number of simultaneously produced beams is greater than the number of phases produced by the fine focus filter.Type: GrantFiled: December 22, 2000Date of Patent: February 24, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Derek Henderson, Brent Stephen Robinson, James Moore, David N. Roundhill, Gary Allen Schwartz
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Patent number: 6660444Abstract: Carrier comprised of a core, a number of the pores thereof containing a polymer, and thereover a coating.Type: GrantFiled: January 10, 2003Date of Patent: December 9, 2003Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, Thomas E. Enright, John A. Creatura, Mary L. Ott, K. Derek Henderson, Paul J. Gerroir
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Publication number: 20030171674Abstract: A diagnostic ultrasonic imaging system includes a scanhead having a plurality of transducer elements. A signal combiner, such a time-division multiplexer or a frequency-division multiplexer, is coupled to each of the transducer elements. The signal combiner combines the signals from the transducer elements into a composite signal and couples the composite signal to an ultrasonic processor through a wire or other communication link. A signal separator, such as a time-division demultiplexer or a frequency-division demultiplexer, is coupled to the link and recovers from the composite signal each of the signals from the transducer elements.Type: ApplicationFiled: March 5, 2002Publication date: September 11, 2003Inventors: James Jago, Gary Schwartz, Derek Henderson, Malcolm Harnois, John Stice, Doug Maxwell
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Patent number: 6605404Abstract: A process which comprises mixing a carrier core with a polymer core and polymer shell and wherein the polymer shell is present as a coating on said core and said polymer core, wherein said polymer core is generated by emulsification of and heating of monomer forming a seed latex; adding a portion of said seed latex to said emulsification mixture, followed by heating and adding another second portion of said seed latex; and wherein said shell is generated by emulsion polymerization of a monomer, followed by heating.Type: GrantFiled: September 28, 2001Date of Patent: August 12, 2003Assignee: Xerox CorporationInventors: John G. VanDusen, Thomas R. Hoffend, K. Derek Henderson, Chieh-Min Cheng
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Publication number: 20030104303Abstract: Carrier comprised of a core, a number of the pores thereof containing a polymer, and thereover a coating.Type: ApplicationFiled: January 10, 2003Publication date: June 5, 2003Applicant: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, Thomas E. Enright, John A. Creatura, Mary L. Ott, K. Derek Henderson, Paul J. Gerroir
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Patent number: 6547735Abstract: An ultrasonic diagnostic imaging system and method are described for more uniformly sector scanning a volumetric or planar image region. The acquired data set comprises raylines extending over the full depth of field and raylines for which near-field image data is omitted. This results in a more uniform spatial sampling of both the near- and far-field regions when scanning with radially steered beams. Processing and storage requirements of the ultrasound system are correspondingly lessened.Type: GrantFiled: December 5, 2001Date of Patent: April 15, 2003Assignee: Koninklijke Philips Electronics N.V.Inventor: Derek Henderson
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Publication number: 20030064314Abstract: A process which comprises mixing a carrier core with a polymer core and polymer shell and wherein the polymer shell is present as a coating on said core and said polymer core, wherein said polymer core is generated by emulsification of and heating of monomer forming a seed latex; adding a portion of said seed latex to said emulsification mixture, followed by heating and adding another second portion of said seed latex; and wherein said shell is generated by emulsion polymerization of a monomer, followed by heating.Type: ApplicationFiled: September 28, 2001Publication date: April 3, 2003Applicant: Xerox CorporationInventors: John G. VanDusen, Thomas R. Hoffend, K. Derek Henderson, Chieh-Min Cheng
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Patent number: 6528225Abstract: Carrier comprised of a core, a number of the pores thereof containing a polymer, and thereover a coating.Type: GrantFiled: March 9, 1998Date of Patent: March 4, 2003Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Enno E. Agur, Thomas E. Enright, John A. Creatura, Mary L. Ott, K. Derek Henderson, Paul J. Gerroir
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Publication number: 20020082500Abstract: A digital multiline beamformer is provided which produces multiple receive beams in response to a single transmit event. An embodiment of the present invention includes a bulk delay which provides a common steering delay applicable to all of the beams received at one time. The bulk delay is succeeded by parallel filter processing paths which produce finely focused multiple beams simultaneously. In one embodiment a multiphase filter produces the samples for multiple beams, which is advantageous when the number of simultaneously produced beams is greater than the number of phases produced by the fine focus filter.Type: ApplicationFiled: December 22, 2000Publication date: June 27, 2002Inventors: Derek Henderson, Brent Stephen Robinson, James Moore, David N. Roundhill, Gary Allen Schwartz
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Patent number: 6399701Abstract: Submicron sized particles of poly(methyl methacrylate) are prepared by a surfactant-free semi-continuous emulsion polymerization process that involves (i) preparing an aqueous phase containing a free radical initiator in water by heating and stirring, (ii) preparing a monomer composition containing at least 80% by weight methyl methacrylate and 1 to 10% by weight of a crosslinking agent, (iii) adding the monomer composition to the aqueous phase to initiate emulsion polymerization of the monomer composition, the adding being done at a rate such that from 0.05% to 5% by weight of the total weight of the monomer composition is added per minute, (iv) continuing heating and stirring following completion of the adding of the monomer composition for an amount of time, and (v) drying and recovering the submicron sized particles of poly(methyl methacrylate). The submicron sized particles of poly(methyl methacrylate are used in forming a coating of carrier particles for a two-component developer composition.Type: GrantFiled: May 15, 2000Date of Patent: June 4, 2002Assignee: Xerox CorporationInventors: Thomas E. Enright, Anthony James Paine, George Liebermann, Kenneth Derek Henderson, Scott M. Silence, Bernard A. Kelly
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Patent number: 6251554Abstract: A carrier comprised of a core and thereover a polymer generated from (1) a polymer containing amine groups, and (2) a second polymer containing sulfonic functional groups.Type: GrantFiled: March 29, 2000Date of Patent: June 26, 2001Assignee: Xerox CorporationInventors: Thomas R. Hoffend, Robert D. Bayley, Carol A. Fox, John G. VanDusen, Scott M. Silence, K. Derek Henderson
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Patent number: 6194117Abstract: A process including: blending carrier particles in a fluidized bed jet mill and continuously separating fine particles formed therein from the resulting blended carrier particles.Type: GrantFiled: August 26, 1999Date of Patent: February 27, 2001Assignee: Xerox CorporationInventors: Lewis S. Smith, Juan M. Tirado, William H. Hollenbaugh, Jr., Scott M. Silence, K. Derek Henderson, Susan J. LaFica, Amy L. Stamp
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Patent number: 6132918Abstract: A process for the preparation of polymers which comprises generating a solution of water and polyvinyl alcohol with acetate groups; adding thereto a mixture of an alkali metal iodide and iodine; adding thereto initiator, and optional crosslinking agent; adding monomer, a mixture of monomers, or a monomer/polymer mixture; homogenizing, and polymerizing; and wherein there is formed an iodide/iodine/acetate complex prior to said polymerizing.Type: GrantFiled: March 29, 2000Date of Patent: October 17, 2000Assignee: Xerox CorporationInventors: Thomas E. Enright, George Liebermann, Scott M. Silence, K. Derek Henderson, Hadi K. Mahabadi, Bernard A. Kelly
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Patent number: 6132917Abstract: A carrier comprised of a core and thereover a polymer generated from a blend of a polymer containing amine groups and a second polymer containing carboxylic acid functional groups.Type: GrantFiled: March 29, 2000Date of Patent: October 17, 2000Assignee: Xerox CorporationInventors: Thomas R. Hoffend, Robert D. Bayley, Carol A. Fox, John G. VanDusen, Scott M. Silence, K. Derek Henderson
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Patent number: 6093770Abstract: A process for the preparation of polymers which comprises generating a solution of water and polyvinyl alcohol with acetate groups; adding thereto a mixture of an alkali metal iodide and iodine; adding thereto initiator, and optional crosslinking agent; adding monomer, a mixture of monomers, or a monomer/polymer mixture; homogenizing, and polymerizing; and wherein there is formed an iodide/iodine/acetate complex prior to said polymerizing.Type: GrantFiled: February 2, 1998Date of Patent: July 25, 2000Assignee: Xerox CorporationInventors: Thomas E. Enright, George Liebermann, Scott M. Silence, K. Derek Henderson, Hadi K. Mahabadi, Bernard A. Kelly
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Patent number: 6087059Abstract: A toner comprised of resin, colorant and a surface additive mixture comprised of two coated silicas, and a coated metal oxide.Type: GrantFiled: June 28, 1999Date of Patent: July 11, 2000Assignee: Xerox CorporationInventors: Michael J. Duggan, K. Derek Henderson, Amy L. Stamp, Scott M. Silence, William H. Hollenbaugh, Jr., Edward J. Gutman, Bernard Grushkin, John G. Ruhland
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Patent number: 6083652Abstract: A carrier composition comprised of a core and coating thereover comprised of a polymer composite, a conductive component, and a matrix resin, and a second resin free of said conductive component.Type: GrantFiled: March 1, 1999Date of Patent: July 4, 2000Assignee: Xerox CorporationInventors: Michael J. Duggan, Scott M. Silence, K. Derek Henderson, John G. VanDusen
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Patent number: 6051353Abstract: A carrier comprised of a core and thereover a polymer generated from the reaction of a component containing amine groups and a component containing epoxy groups.Type: GrantFiled: September 7, 1999Date of Patent: April 18, 2000Assignee: Xerox CorporationInventors: Thomas R. Hoffend, Robert D. Bayley, Carol A. Fox, John G. VanDusen, Scott M. Silence, K. Derek Henderson, Charles H. Honeyman, Paula J. MacLeod, Paul F. Smith, Thomas E. Enright
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Patent number: 6042981Abstract: A composition comprised of a core and thereover a polymer of (1) polystyrene/alkyl methacrylate/dialkylaminoethyl methacrylate, (2) polystyrene/alkyl methacrylate/alkyl hydrogen aminoethyl methacrylate, (3) polystyrene/alkyl acrylate/dialkylaminoethyl methacrylate, or (4) polystyrene/alkyl acrylate/alkyl hydrogen aminoethyl methacrylate.Type: GrantFiled: August 26, 1998Date of Patent: March 28, 2000Assignee: Xerox CorporationInventors: Angelo J. Barbetta, Robert D. Bayley, Carol A. Fox, Thomas R. Hoffend, Scott M. Silence, K. Derek Henderson, John G. VanDusen