Patents by Inventor Stephen An

Stephen An 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: 6225118
    Abstract: A multicellular in vitro assay for modeling the combined stages of angiogenesis namely the proliferation, migration and differentiation stages of cell development, wherein the assay comprises providing a dual culture of endothelial cells together with another cell-type exhibiting interaction therewith to display the combined stages of angiogenesis in vitro.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: May 1, 2001
    Assignee: Biocure Limited
    Inventors: Eileen T. Grant, Graham T. Bell, Stephen Bloor
  • Patent number: 6225518
    Abstract: A molecular sieve used in a process for separating olefinic hydrocarbons from paraffinic hydrocarbons is regenerated in a method which removes diolefins and aromatic hydrocarbons from the molecular sieve. The method comprises contacting the sieve with alkaline water and then drying the sieve with stream of a superheated light paraffin. The molecular sieve may be present in either a guard bed used upstream of a main separation zone or as part of the main adsorptive separation zone.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: May 1, 2001
    Assignee: UOP LLC
    Inventors: Stephen Wayne Sohn, Santi Kulprathipanja
  • Patent number: 6226372
    Abstract: A system and method for implementing a fully integrated and cooperative telecommunications firewall/scanner that can be deployed either as a standalone device, or over a large-scale distributed client-server architecture is described. In addition to providing enhanced telecommunications firewall and scanner security capabilities, the integrated telecommunications firewall/scanner provides the capability to ensure implementation of a corporate-dictated security structure, and event visibility and report consolidation requirements, across a globally-distributed enterprise, using policy-based enforcement of a Security Policy. In the most basic configuration, the integrated firewall/scanner performs continuous security access monitoring and control functions, keyword and content monitoring and control functions, and remote access authentication, initiating coordinated vulnerability assessments, as well as automatic synchronous adjustments to the Security Policy in response to the vulnerability assessment results.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: May 1, 2001
    Assignee: Securelogix Corporation
    Inventors: Todd Beebe, Mark D. Collier, Doug Conyers, Chris Hamlett, Stephen Faustino
  • Patent number: 6225465
    Abstract: A new process for preparing substituted 7-aminocarbonyl-3-oxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepines is disclosed.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: May 1, 2001
    Assignee: SmithKline Beecham plc
    Inventors: Stephen K. Etridge, Timothy Charles Walsgrove, Jerome Hayes, Andrew S. Wells
  • Patent number: 6225312
    Abstract: The invention relates to a group of new piperazine and piperidine compounds having interesting pharmacological properties. It has been found that compounds of formula (a) wherein A represents a heterocyclic group of 5-7 ring atoms wherein 1-3 heteroatoms from the group O, N and S are present; R1 is hydrogen or fluoro; R2 is C1-4-alkyl, C1-4-alkoxy or an oxo group, and p is 0, 1 or 2; Z represents carbon or nitrogen, and the dotted line is a single bond when Z is nitrogen, and a single or double bond when Z is carbon; R3 and R4 independently are hydrogen or C1-4-alkyl; n has the value 1 or 2; R5 is halogen, hydroxy, C1-4-alkoxy or C1-4-alkyl, and q is 0, 1, 2 or 3; Y is phenyl, furanyl or thienyl, which groups may be substituted with 1-3 substituents of the group hydroxy, halogen, C1-4-alkoxy, C1-4-alkyl, cyano, aminocarbonyl, mono- or di-C1-4-alkylaminocarbonyl; and salts thereof show high affinity for both the dopamine D2 and serotonin 5-HT1A receptors.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: May 1, 2001
    Assignee: Duphar International Research B.V.
    Inventors: Roelof Willem Feenstra, Cornelis Gerrit Kruse, Martinus Theodorus Maria Tulp, Wilma Kuipers, Stephen Kenneth Long
  • Patent number: 6224023
    Abstract: An improved railroad trackwork spring wing frog is provided with a rail-closer having a single compression spring whose reaction forces are applied to the frog spring wing rail through movable linkages that are each connected to the spring wing rail at different spaced-apart position and that each abut the single compression spring.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: May 1, 2001
    Assignee: ABC Rail Products Corporation
    Inventors: Keith Young, Stephen R. Kuhn
  • Patent number: 6225431
    Abstract: A biocompatibilizing process in which the surface of a material in need of being biocompatibilized is coated with a copolymer formed by radical polymerization of ethylenically unsaturated monomers comprising a zwitterionic monomer having a sulphobetaine group and a comonomer having a group selected for providing a stable coating of polymer on the said surface. The comonomer may have a hydrophobic group for binding to oppositely charged ionic groups at the surface or a reactive group for forming a covalent bond with functional groups at the surface and/or for forming cross-links in the polymer coating.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: May 1, 2001
    Assignee: Biocompatibles Limited
    Inventors: Roderick W J Bowers, Stephen Jones, Peter William Stratford
  • Patent number: 6224785
    Abstract: A semiconductor wafer cleaning formulation for use in post plasma ashing semiconductor fabrication comprising the following components in the percentage by weight ranges shown: Ammonium fluoride and/or a derivative thereof;  1-21% an organic amine or mixture of two amines; 20-55% water; 23-50% a metal chelating agent or mixture of chelating agents.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: May 1, 2001
    Assignee: Advanced Technology Materials, Inc.
    Inventors: William A. Wojtczak, George Guan, Daniel N. Fine, Stephen A. Fine
  • Patent number: 6226788
    Abstract: In a network management system, a method and apparatus for preparing a computer program for execution in relation to a particular network device among a plurality of network devices having a plurality of device types is provided. Each network device is associated with a device type value, and each network device has an associated device mapper. The device mappers are stored in a hierarchical structure that reflects a functional relationship or family relationship of the devices. Functions to be carried out by one or more devices are expressed as a plurality of executable program components. Preferably, each executable program component has one or more classes that define executable functions. Each device mapper associates a device type value with one or more overridden classes in the executable program components and one or more overriding classes. At runtime, device type values are acquired for each device in the managed network.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: May 1, 2001
    Assignee: Cisco Technology, Inc.
    Inventors: Charles B. Schoening, Richard J. Smith, Jr., Stephen I. Schleimer
  • Patent number: 6226142
    Abstract: A technique for formatting a magnetic disk for a removable magnetic cartridge includes the steps of providing the magnetic disk having a top surface and a bottom surface, writing a first servo track onto the top surface, the first servo track having a portion including a first gray code, a first position burst, and a second position burst, writing a second servo track onto the top surface adjacent to the first servo track, the second servo track having a portion including a second gray code, the second position burst, and a third position burst, and writing a third servo track onto the top surface adjacent to the second servo track, the third servo track having a portion including the second gray code, the third position burst and a fourth position burst, wherein a first data track comprises the first servo track, the second servo track and the third servo track.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: May 1, 2001
    Assignee: Castlewood Systems, Inc.
    Inventors: David Drouin, Vien N Nguyen, Stephen R. Jackson
  • Patent number: 6225355
    Abstract: The invention relates to a method for removing bile salts from a patient in need thereof and compositions use full in the method. The method comprises administering to the patient a therapeutically effective amount of a salt of an alkylated and crosslinked polymer. The alkylated and crosslinked polymer salt comprises the reaction product of polymers, or salts and copolymers thereof having amine containing repeat units, with at least one aliphatic alkylating agent and a crosslinking agent.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: May 1, 2001
    Assignee: GelTex Pharmaceuticals, Inc.
    Inventors: W. Harry Mandeville, III, Stephen Randall Holmes-Farley
  • Patent number: 6226734
    Abstract: Multiple instances of operating systems execute cooperatively in a single multiprocessor computer wherein all processors and resources are electrically connected together. The single physical machine with multiple physical processors and resources is subdivided by software into multiple partitions, each with the ability to run a distinct copy, or instance, of an operating system. At different times, different operating system instances may be loaded on a given partition. Resources, such as CPUs and memory, can be dynamically assigned to different partitions and used by instances of operating systems running within the machine by modifying the configuration. The partitions themselves can also be changed without rebooting the system by modifying the configuration tree. CPUs, in particular, may be migrated, or reassigned, from one partition and operating system instance to another, allowing different loads in the system to be accommodated.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: May 1, 2001
    Assignee: Compaq Computer Corporation
    Inventors: Frederick G. Kleinsorge, Stephen F. Shirron
  • Patent number: 6224685
    Abstract: A terpene-free hard surface cleaning composition containing: (a) a nonionic surfactant; (b) an anionic surfactant; (c) a primary solvent consisting of a C6-C14 methyl ester; (d) a short-chain cosurfactant; and (e) water, all weights being based on the total weight of the composition.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: May 1, 2001
    Assignee: Henkel Corporation
    Inventors: Stephen F. Gross, Martin J. Barabash, J. Frederick Hessel
  • Patent number: 6226771
    Abstract: An error detection generator calculates error detection data for insertion into encapsulated frames. The error detection generator is configured to calculate multiple error detection values and insert them into corresponding fields of the encapsulated frames. The error detection generator includes a controller, three cyclic redundancy check (CRC) engines and at least one multiplexer. Each CRC engine is selectively enabled by the controller to calculate a frame check sequence (FCS) value on a different portion of the frame. Downstream CRC engines also receive the outputs from the upstream CRC engines so that these earlier FCS values may be used during subsequent calculations. The outputs of the CRC engines are also inserted into the appropriate fields of the encapsulated frames by the multiplexer.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: May 1, 2001
    Assignee: Cisco Technology, Inc.
    Inventors: Stephen C. Hilla, James M. Edwards, Timothy F. Masterson, William E. Jennings
  • Patent number: 6223878
    Abstract: A coin validator is arranged to sample the outputs of electromagnetic sensors in order to derive measurements for use in testing coins. Frequency measurements are made by counting a predetermined number of oscillator cycles, terminating the sample period in response to this count being reached, and taking into account the duration of the sampling period and the number of cycles of the oscillator during the sampling period, including any cycles which may have occurred following the predetermined number. The predetermined number is altered in order to change the sampling period.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: May 1, 2001
    Assignee: Mars Incorporated
    Inventors: Thomas J. Cattani, Stephen John Dillon
  • Patent number: 6225398
    Abstract: A method for formulating an aqueous dispersion of a polymer includes dissolving a polymer such as an acrylic polyol in a solvent to form a polymer solution. A surfactant is added to the polymer solution, and water is then added with mixing sufficient to dispersed the polymer in the water. The resulting aqueous dispersion can be mixed with a water dispersible polyisocyanate to produce coating materials which can be cured to form tough films and coatings.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: May 1, 2001
    Assignee: Henkel Corporation
    Inventors: Chase J. Boudreaux, Stephen A. Fischer, Kartar S. Arora, Grannis S. Johnson
  • Patent number: 6224675
    Abstract: Embodiments of the present invention provide a multiple head dispensing system having independently controlled dispensing heads. Each of the dispensing heads may be independently controlled to provide simultaneous, asynchronous operation and to allow dispensing of different materials onto substrates. Independent control of the dispensing heads is accomplished under the control of a controller in conjunction with a plurality of gantry systems, each of which positions one of the multiple dispensing heads over a substrate that is to receive dispensing material. In some embodiments, each gantry system utilizes two drive mechanisms, arranged in parallel, that provide movement of the dispensing head over an x-y plane. Multiple conveyor systems are utilized that allow parallel processing of work products in the dispensing system.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: May 1, 2001
    Assignee: Speedline Technologies, Inc.
    Inventors: Thomas C. Prentice, Brian P. Prescott, Thomas Purcell, Stephen S. Helm, Donald J. Martin, Kevin Brown
  • Patent number: 6225290
    Abstract: Intestinal epithelial cells of a mammalian subject are genetically altered to operatively incorporate a gene which expresses a protein which has a desired therapeutic effect. Intestinal cell transformation is accomplished by administration of a formulation composed primarily of naked DNA, and is preferably administered orally. Oral or other intragastrointestinal routes of administration provide a simple method of administration, while the use of naked nucleic acid avoids the complications associated with use of viral vectors to accomplish gene therapy. The expressed protein is secreted directly into the gastrointestinal tract and/or blood stream to obtain therapeutic blood levels of the protein thereby treating the patient in need of the protein. The transformed intestinal epithelial cells provide short or long term therapeutic cures for diseases associated with a deficiency in a particular protein or which are amenable to treatment by overexpression of a protein.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: May 1, 2001
    Assignee: The Regents of the University of California
    Inventors: Michael German, Ira D. Goldfine, Stephen S. Rothman
  • Patent number: D441245
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: May 1, 2001
    Assignee: Bloorview MacMillan Centre
    Inventors: Stephen Ryan, Gloria Leibel, Michael Doell, Alan Barber, Shone Stickel
  • Patent number: RE37152
    Abstract: A griller having a substantially horizontally extending grill member to support food while being grilled, the grill member consisting of alternating bars and slots the bars being made of aluminium, aluminium alloy or a substance having similar heat transmitting properties there being arranged under the grill member an elongated electric heating element that is accommodated within a groove formed on the underside of the grill member, whereby fats and liquids emerging from food being cooked on the grill member are prevented from coming into contact with the electric heating element, an electric plug socket connected to the electric heating element directly and without intervention of a thermostat, the heating element and the grill member being constructed and arranged so that heat from the heating element is distributed more or less evenly over the surface of the grill member, the grill member being removeably supported on a container that in use underlies the grill member and acts to catch fat and liquids from
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: May 1, 2001
    Inventors: William J. O'Brien, Stephen J. McClean