Patents by Inventor Charles W. Stewart

Charles W. Stewart 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: 10147221
    Abstract: A solution for targeting a visual function of an observer is provided. The solution presents an animation for display to an observer. The animation includes a background and at least a portion of the animation also includes one or more foreground areas, each of which is located in a portion of the background. The background and the foreground area(s) include a set of common attributes substantially continuously changing during the animation and at least one different attribute between the background and the foreground area. At least one attribute of the background changes randomly during the animation. The at least one different attribute targets the visual function.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: December 4, 2018
    Assignee: Konan Medical USA, Inc.
    Inventor: Charles W. Stewart
  • Publication number: 20170186210
    Abstract: A solution for targeting a visual function of an observer is provided. The solution presents an animation for display to an observer. The animation includes a background and at least a portion of the animation also includes one or more foreground areas, each of which is located in a portion of the background. The background and the foreground area(s) include a set of common attributes substantially continuously changing during the animation and at least one different attribute between the background and the foreground area. At least one attribute of the background changes randomly during the animation. The at least one different attribute targets the visual function.
    Type: Application
    Filed: March 13, 2017
    Publication date: June 29, 2017
    Applicant: Konan Medical USA, Inc.
    Inventor: Charles W. Stewart
  • Patent number: 9595126
    Abstract: A solution for targeting a visual function of an observer is provided. The solution presents an animation for display to an observer. The animation includes a background and at least a portion of the animation also includes one or more foreground areas, each of which is located in a portion of the background. The background and the foreground area(s) include a set of common attributes substantially continuously changing during the animation and at least one different attribute between the background and the foreground area. At least one attribute of the background changes randomly during the animation. The at least one different attribute targets the visual function.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: March 14, 2017
    Assignee: Konan Medical USA, Inc.
    Inventor: Charles W. Stewart
  • Publication number: 20160171741
    Abstract: A solution for targeting a visual function of an observer is provided. The solution presents an animation for display to an observer. The animation includes a background and at least a portion of the animation also includes one or more foreground areas, each of which is located in a portion of the background. The background and the foreground area(s) include a set of common attributes substantially continuously changing during the animation and at least one different attribute between the background and the foreground area. At least one attribute of the background changes randomly during the animation. The at least one different attribute targets the visual function.
    Type: Application
    Filed: December 15, 2014
    Publication date: June 16, 2016
    Applicant: KONAN MEDICAL USA, INC.
    Inventor: Charles W. Stewart
  • Publication number: 20160035122
    Abstract: A solution for targeting a visual function using varying contrasting areas is provided. An animation including a changing figure can be generated. The changing figure can include contrasting areas having attributes that change substantially continually during the animation. For example, a location of the contrasting areas within the changing figure can be changed to create an appearance of motion of the contrasting areas within the changing figure. The shape attributes can be determined based on a target visual function, a target performance level of the target visual function, and a plurality of display attributes of a display environment for an observer. The animation can be provided for display to the observer, and an indication of whether the observer is able to perceive the changes can be received and used to assess a performance level of the visual function.
    Type: Application
    Filed: July 31, 2014
    Publication date: February 4, 2016
    Inventors: Charles W. Stewart, Allan N. Hytowitz
  • Publication number: 20120008091
    Abstract: A solution for evaluating the pupillary responses of a patient is disclosed. The solution includes exposing one eye of a patient to flashes having varying patterns and concurrently recording the pupillary responses of both eyes of the patient to the flash. At least some of the patterns can be configured to stimulate/not stimulate the macula region of the patient's eye. The solution also can include reducing one or more non-visual stimuli experienced by the patient while the pupillary responses are being induced and recorded.
    Type: Application
    Filed: July 6, 2011
    Publication date: January 12, 2012
    Inventor: Charles W. Stewart
  • Publication number: 20040242771
    Abstract: The present invention is a low-temperature-decomposable engineering plastic resin composition prepared by formulating a low-temperature-decomposable engineering plastic with a fluorine-containing resin, wherein said low-temperature-decomposable engineering plastic has a melting point of not higher than 200° C. and a decomposition temperature of not higher than 300° C., and wherein said fluorine-containing resin is a resin comprising a fluorine-containing polymer, said fluorine-containing polymer having a fluorine atom and at least one atom species selected from the group consisting of hydrogen atom, chlorine atom, bromine atom and iodine atom, said fluorine atom and said at least one atom species being bound to a non-terminal carbon atom constituting a main chain, and said fluorine-containing polymer having substantially no polar functional groups reactive to the low-temperature-decomposable engineering plastic.
    Type: Application
    Filed: August 20, 2003
    Publication date: December 2, 2004
    Inventors: Katsuyoshi Kubo, Takahide Otsuka, Masahiko Oka, Tsuyoshi Miyamori, Charles W. Stewart, Carolyn Stewart
  • Publication number: 20040102572
    Abstract: The present invention is a resin composition prepared by formulating an engineering plastic with a fluorine-containing polymer wherein said fluorine-containing polymer accounts for 0.005 to 1 mass % of the total of a mass of said engineering plastic and a mass of said fluorine-containing polymer, wherein said fluorine-containing polymer is a perfluoropolymer, and wherein said resin composition is used for extrusion molding or injection molding.
    Type: Application
    Filed: August 25, 2003
    Publication date: May 27, 2004
    Inventors: Katsuyoshi Kubo, Takahide Otsuka, Masahiko Oka, Tsuyoshi Miyamori, Charles W. Stewart, Carolyn Stewart
  • Publication number: 20030144370
    Abstract: The combination of fluoropolymer processing aid with foam cell nucleating agent gives a combined processing aid that is far superior to either individually when used in the extrusion of melt processible polymers.
    Type: Application
    Filed: January 22, 2003
    Publication date: July 31, 2003
    Inventors: Charles W. Stewart, Stuart K. Randa, Savvas G. Hatzikiriakos, Evgueni E. Rozenbaoum, Marlin D. Buckmaster
  • Publication number: 20030109646
    Abstract: A resin composition prepared by formulating an engineering plastic with a fluorine-containing polymer in a mass ratio of the engineering plastic to the fluorine-containing polymer of from 99:1 to 99.995:0.005. Also disclosed is a method for producing a shaped article by melting and molding the resin composition.
    Type: Application
    Filed: November 21, 2001
    Publication date: June 12, 2003
    Applicant: DAIKIN INSTITUTE OF ADVANCED CHEMISTRY AND TECHNOLOGY
    Inventors: Katsuyoshi Kubo, Takahide Otsuka, Masahiko Oka, Charles W. Stewart, Carolyn Stewart
  • Patent number: 6423798
    Abstract: Novel copolymers of fluorinated olefins and maleic anhydride, maleic acid, dichloromaleic anhydride or dichloromaleic acid may be made by using as solvents for the maleic anhydride or acid a perfluorinated alkyl carboxylic acid, or liquid or supercritical hexafluoropropylene or carbon dioxide. The resulting polymers are useful as adhesives or compatibilizing agents for fluoropolymers, and in coatings.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: July 23, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Clayton Wheland, Paul Douglas Brothers, Colin Anolick, Charles W. Stewart, Sr.
  • Publication number: 20010048179
    Abstract: The combination of fluoropolymer processing aid with foam cell nucleating agent gives a combined processing aid that is far superior to either individually when used in the extrusion of melt processible polymers.
    Type: Application
    Filed: December 19, 2000
    Publication date: December 6, 2001
    Inventors: Charles W. Stewart, Stuart K. Randa, Savvas G. Hatzikiriakos, Evgueni E. Rozenbaoum, Marlin D. Buckmaster
  • Publication number: 20010012880
    Abstract: Novel copolymers of fluorinated olefins and maleic anhydride, maleic acid, dichloromaleic anhydride or dichloromaleic acid may be made by using as solvents for the maleic anhydride or acid a perfluorinated alkyl carboxylic acid, or liquid or supercritical hexafluoropropylene or carbon dioxide. The resulting polymers are useful as adhesives or compatibilizing agents for fluoropolymers, and in coatings.
    Type: Application
    Filed: February 14, 2001
    Publication date: August 9, 2001
    Inventors: Robert C. Wheland, Paul D. Brothers, Colin Anolick, Charles W. Stewart
  • Patent number: 6228963
    Abstract: Novel copolymers of fluorinated olefins and maleic anhydride, maleic acid, dichloromaleic anhydride or dichloromaleic acid may be made by using as solvents for the maleic anhydride or acid a perfluorinated alkyl carboxylic acid, or liquid or supercritical hexafluoropropylene or carbon dioxide. The resulting polymers are useful as adhesives or compatibilizing agents for fluoropolymers, and in coatings.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: May 8, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Clayton Wheland, Paul Douglas Brothers, Colin Anolick, Charles W. Stewart, Sr.
  • Patent number: 5951714
    Abstract: A process for enzymatic discharge printing of the surface of dyed fabric, especially cellulosic fabric such as denim, including an oxidoreductase and enhancing agent system.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: September 14, 1999
    Assignee: Novo Nordisk Biochem North America, Inc.
    Inventors: Gregory K. Hall, Charles W. Stewart, Garrett A. Screws
  • Patent number: 5637663
    Abstract: Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: June 10, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Colin Anolick, Viacheslav A. Petrov, Bruce E. Smart, Charles W. Stewart, Robert C. Wheland, William B. Farnham, Andrew E. Feiring, Weiming Qiu
  • Patent number: 5547761
    Abstract: Copolymers of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP) having high HFP content and end-of-melting temperature, T.sub.m (end), as low as 200.degree. C. are disclosed. Exceptional performance as a processing aid in polyolefins results from having T.sub.m (end) of the TFE/HFP copolymer close to the processing temperature of the polyolefin. These TFE/HFP copolymers are soluble in fluorinated cyclic solvents. Copolymer/solvent systems copolymer at significant concentrations in selected solvents are fluid and stable at room temperature.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: August 20, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: George R. Chapman, Jr., Richard A. Morgan, Charles W. Stewart, William H. Tuminello, John G. Van Alsten, Randall A. Vogel, Mark E. Wagman
  • Patent number: 5478905
    Abstract: Disclosed herein are novel amorphous tetrafluoroethylene/hexafluoropropylene (TFE/HFP) copolymers, which are more random than previous amorphous TFE/HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: December 26, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Colin Anolick, Viacheslav A. Petrov, Bruce E. Smart, Charles W. Stewart, Robert C. Wheland
  • Patent number: 5464904
    Abstract: Copolymers of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP) having high HFP content and end-of-melting temperature, T.sub.m (end), as low as 200.degree. C. are disclosed. Exceptional performance as a processing aid in polyolefins results from having T.sub.m (end) of the TFE/HFP copolymer close to the processing temperature of the polyolefin. These TFE/HFP copolymers are soluble in fluorinated cyclic solvents. Copolymer/solvent systems copolymer at significant concentrations in selected solvents are fluid and stable at room temperature.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: November 7, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: George R. Chapman, Jr., Lewis E. Crenshaw, Rita S. McMinn, Richard A. Morgan, Donnan E. Priester, Charles W. Stewart, Robert E. Tarney
  • Patent number: 5356986
    Abstract: Fluoroelastomers and fluoroplastics are plasticized with high-boiling fluorinated aliphatic cyclic structures to enhance processibility or to improve final properties.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: October 18, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles W. Stewart, Peter D. Spohn