Patents by Inventor Richard C. Chang

Richard C. Chang 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: 11934461
    Abstract: A method uses natural language for visual analysis of a dataset. A data visualization application displays a data visualization, at a computer, based on a dataset retrieved from a database using a set of one or more queries. A user specifies a natural language command related to the displayed data visualization, and the computer extracts an analytic phrase from the natural language command. The computer computes semantic relatedness between the analytic phrase and numeric data fields in the dataset. The computer identifies numeric data fields having highest semantic relatedness to the analytic phrase, and also selects a relevant numerical function. The numerical function compares data values in the numeric data fields to a threshold value. The computer retrieves an updated dataset that filters the identified numeric data fields according to the numeric function. The computer then displays an updated data visualization using the updated dataset.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: March 19, 2024
    Assignee: Tableau Software, Inc.
    Inventors: Vidya R. Setlur, Sarah E. Battersby, Melanie K. Tory, Richard C. Gossweiler, III, Angel Xuan Chang, Isaac James Dykeman, Md Enamul Hoque Prince
  • Patent number: 4214020
    Abstract: Processes are disclosed for coating the exteriors of a plurality of hollow fibers which are suitable for fluid separations and which are assembled in the form of a bundle. The processes involve immersing the bundle of hollow fibers in a coating liquid containing material suitable for forming the coating and a substantial amount of solvent. A pressure drop from the exteriors to the interiors of the hollow fibers is provided to result in the formation of a deposit on the exteriors of the hollow fibers. The processes of this invention enable essentially the entire exterior surfaces of the hollow fibers to be coated without undue sticking of the hollow fibers or providing undesirably thick coatings on the hollow fibers in any portion of the bundle or on a portion of any of the hollow fibers.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: July 22, 1980
    Assignee: Monsanto Company
    Inventors: Robert R. Ward, Richard C. Chang, James C. Danos, Joseph A. Carden, Jr.
  • Patent number: 4157960
    Abstract: The selectivities of fluid separations of membranes having pores, in which the material of the membranes significantly effects the fluid separations, can be enhanced by the storage of the membranes in water. Suitable materials of the membranes for improvement in accordance with this invention are those which are not unduly susceptible to biodegradation. The membranes for improvement in accordance with this invention preferably have structures which are not unduly affected by drying and thus maintain beneficial mechanical and fluid separation properties after drying.
    Type: Grant
    Filed: November 30, 1977
    Date of Patent: June 12, 1979
    Assignee: Monsanto Company
    Inventors: Richard C. Chang, Robert R. Ward
  • Patent number: 4119580
    Abstract: A method for forming agglomerated ion exchange particles in which finely divided synthetic resin coating particles are affixed to the surface of synthetic resin substrate particles. The surface of the coating particles have ion exchange sites with monovalent counterions (e.g., negatively charged) which are attracted to the ion exchange sites on the substrate particles. Multivalent ions (e.g., carbonate) of the same charge as such monovalent counterions are mixed into an aqueous disperson of the coating particles to displace the monovalent counterions thereby increasing the electrostatic charge density of the coating particles. Then, a slurry of the synthetic resin substrate particles is added dropwise to this dispersion which is mixed to form agglomerates by electrostatic attraction.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: October 10, 1978
    Assignee: Dionex Corporation
    Inventors: Frank C. Smith, Jr., Richard C. Chang