Patents by Inventor John D. Stewart

John D. 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: 7568160
    Abstract: Techniques for real-time observation assessment are provided. The techniques, which are designed for educators, take advantage of handheld computers, desktop/laptop computers and Internet access in order to reduce the paperwork associated with conventional educational assessments. An array of instructional assessment applications are designed to run on handheld computers. The instructional assessment applications may be based on existing and widely used paper methodologies. A common Web-based platform for assessment application distribution, selection, download, data management and reporting is also provided. Users can then periodically synchronize instructional data (assessments, diagnostic results, notes and/or schedules) to the Web site. At the Web site, browser-based reports and analysis can be viewed, administered and shared via electronic mail.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: July 28, 2009
    Assignee: Wireless Generation, Inc.
    Inventors: Lawrence Jason Berger, Gregory M. Gunn, John D. Stewart, Kenneth M. Gunn, Elizabeth Lynn, Nicole M. Adams, Anouk Markovits, Aaron Boyd
  • Patent number: 7114126
    Abstract: A system, method and computer program product for real-time observation assessment is provided. The invention, designed for educators, takes advantage of handheld computers, desktop/laptop computers and the increasing presence of Internet access in order to reduce the paperwork associated with conventional educational assessments. The invention includes an array of instructional assessment applications designed to run on handheld computers. The instructional assessment applications may be based on existing and widely-used paper methodologies. A common Web-based platform for assessment application distribution, selection, download, data management and reporting is also provided. Users can then periodically synchronize instructional data (assessments, diagnostic results, notes and/or schedules) to the Web site. At the Web site, browser-based reports and analysis can be viewed, administered and shared via electronic mail.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: September 26, 2006
    Assignee: Wireless Generation, Inc.
    Inventors: Lawrence J. Berger, Gregory M. Gunn, John D. Stewart, Kenneth M. Gunn, Elizabeth Lynn, Nicole M. Adams, Anouk Markovits, Aaron Boyd
  • Publication number: 20040087745
    Abstract: A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.
    Type: Application
    Filed: June 26, 2003
    Publication date: May 6, 2004
    Applicant: Phillips Petroleum Company
    Inventors: Ashish M. Sukhadia, Elizabeth A. Benham, Joseph J. Bergmeister, Rex L. Bobsein, Gerhard K. Guenther, Eric T. Hsieh, Max P. McDaniel, Steven J. Secora, Joseph S. Shveima, John D. Stewart
  • Patent number: 6617403
    Abstract: A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: September 9, 2003
    Assignee: Phillips Petroleum Company
    Inventors: Ashish M. Sukhadia, Elizabeth A. Benham, Joseph J. Bergmeister, Rex L. Bobsein, Gerhard K. Guenther, Eric T. Hsieh, Max P. McDaniel, Steven J. Secora, Joseph S. Shveima, John D. Stewart
  • Publication number: 20030087219
    Abstract: A system, method and computer program product for real-time observation assessment is provided. The invention, designed for educators, takes advantage of handheld computers, desktop/laptop computers and the increasing presence of Internet access in order to reduce the paperwork associated with conventional educational assessments. The invention includes an array of instructional assessment applications designed to run on handheld computers. The instructional assessment applications may be based on existing and widely-used paper methodologies. A common Web-based platform for assessment application distribution, selection, download, data management and reporting is also provided. Users can then periodically synchronize instructional data (assessments, diagnostic results, notes and/or schedules) to the Web site. At the Web site, browser-based reports and analysis can be viewed, administered and shared via electronic mail.
    Type: Application
    Filed: July 18, 2002
    Publication date: May 8, 2003
    Inventors: Lawrence J. Berger, Gregory M. Gunn, John D. Stewart, Kenneth M. Gunn, Elizabeth Lynn, Nicole M. Adams, Anouk Markovits, Aaron Boyd
  • Publication number: 20030083444
    Abstract: Apparatus for removing a concentrated slurry from a flowing stream of slurry in a conduit characterized by a channel in an outlet area of the conduit, the outlet being adapted to continuously remove slurry. In a specific embodiment, an olefin polymerization apparatus is disclosed wherein monomer, diluent and catalyst are circulated in a continuous pipe loop reactor and product slurry is recovered by a continuous product take off means. The pipe has a channel or groove leading to the continuous product take off means. In one embodiment, the slurry is heated in a flash line heater and passed to a high pressure flash where a majority of the diluent is separated and thereafter condensed by simple heat exchange, without compression, and thereafter recycled, bottoms from the high pressure flash being passed to a low pressure flash where polymer is recovered and entrained liquid is flashed overhead. In another embodiment the flash line feeds a single flash chamber.
    Type: Application
    Filed: December 5, 2002
    Publication date: May 1, 2003
    Inventors: Robert R. McElvain, John D. Stewart, Raymond G. Sewell, Robert W. Bohmer, Casey T. Collins, Ted Cymbaluk
  • Publication number: 20020028891
    Abstract: A copolymer of ethylene and a higher alpha-olefin having broadened melt processing windows and reduced melt fracture can be produced using a chromium-containing catalyst system and a trialkyl boron cocatalyst. The polymerization process must be carefully controlled to produce a copolymer resin that easily can be made into articles of manufacture.
    Type: Application
    Filed: August 20, 2001
    Publication date: March 7, 2002
    Applicant: Phillips Petroleum Company
    Inventors: Ashish M. Sukhadia, Elizabeth A. Benham, Joseph J. Bergmeister, Rex L. Bobsein, Gerhard K. Guenther, Eric T. Hsieh, Max P. McDaniel, Steven J. Secora, Joseph S. Shveima, John D. Stewart
  • Patent number: 5866661
    Abstract: A process to control the heat transfer coefficient in slurry olefin polymerization processes comprising shocking the polymerization reactor is provided. This shock comprises quickly decreasing and then restoring to normal operating conditions, the higher alpha-olefin comonomer to ethylene monomer weight feed ratio.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: February 2, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Elizabeth A. Benham, Max P. McDaniel, John D. Stewart, Lonnie J. Dodson, Charles R. Nease
  • Patent number: 5493852
    Abstract: A universal spreader attachment consisting of an inverted triangular hopper hung from the cross-brace support of the handlebars of a lawnmower, with holes drilled in the bottom of the hopper to allow the substance being spread to disperse onto the lawn. The holes are opened and closed by moving a sliding member, which has corresponding holes drilled into it.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: February 27, 1996
    Inventor: John D. Stewart
  • Patent number: 4801638
    Abstract: Pigmentary copper phthalocyanine is prepared by converting crude copper phthalocyanine by methods known per se in the presence of trichlorophenoxy copper phthalocyanine. The resulting pigment is heat resistant and solvent resistant.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: January 31, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Langley, John D. Stewart, Arthur S. Walls
  • Patent number: 4801634
    Abstract: Pigmentary copper phthalocyanine is prepared by converting crude copper phthalocyanine by methods known per se in the presence of trichlorophenoxy copper phthalocyanine. The resulting pigment is heat resistant and solvent resistant.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: January 31, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Langley, John D. Stewart, Arthur S. Walls
  • Patent number: 4694078
    Abstract: Pigmentary copper phthalocyanine is prepared by converting crude copper phthalocyanine by methods known per se in the presence of trichlorophenoxy copper phthalocyanine. The resulting pigment is heat resistant and solvent resistant.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: September 15, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Langley, John D. Stewart, Arthur S. Walls
  • Patent number: D518378
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: April 4, 2006
    Inventor: John D. Stewart
  • Patent number: D540178
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: April 10, 2007
    Assignee: Hotel California Tequila S.de.R.L.de.C.V.
    Inventor: John D. Stewart
  • Patent number: D568165
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: May 6, 2008
    Assignee: Hotel California Tequila S. de R. L. de. C. V.
    Inventors: Debra M. Stewart, legal representative, John D. Stewart