Patents by Inventor William Bernard Fisher

William Bernard Fisher 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).

  • Decomposition of cumene oxidation product
    Publication number: 20020040165
    Abstract: A process for decomposing a cumene oxidation product mixture containing cumene hydroperoxide (CHP) and dimethylphenyl carbinol (DMPC) to produce phenol, acetone and alpha-methyl styrene (AMS) with enhanced safety of operation and reduced by-product formation which comprises the steps:
    Type: Application
    Filed: July 23, 2001
    Publication date: April 4, 2002
    Inventors: Richard R. Hertzog, Stylianos Sifniades, William Bernard Fisher
  • Selective polyamide recovery from multi-component materials
    Patent number: 5889142
    Abstract: A process for selectively separating polyamides from multi-component waste materials including the steps of subjecting the multi-component mix to a specific mixture of caprolactam and water at a preselected temperature range below the degradation temperature of the polymer to be recovered, separating the formed polyamide solution, and recovering the desired polyamide. The process is very desirable for separating multi-component waste materials which contain not only nylon 6, but also nylon 6,6. The recovered polyamide may be used in molding applications and in fiber such as carpet fiber.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: March 30, 1999
    Assignee: AlliedSignal Inc.
    Inventors: Yousef Mohajer, Thomas Paul Izod, William Bernard Fisher, Scott Martin Hacker
  • Production of cyclohexanone
    Patent number: 4092360
    Abstract: In production of cyclohexanone by hydrogenating phenol in the presence of a hydrogenation catalyst, improved catalyst life and improved hydrogenation rate are obtained if ketone impurities, particularly hydroxyacetone, are removed from the phenol prior to the hydrogenation. The present invention provides an improved method for reducing the ketone impurities in the phenol by contacting the phenol with a polyethylenimine and distilling the mixture formed to separate the phenol. The invention is particularly useful in production of cyclohexanone from phenol obtained by decomposition of cumene hydroperoxide.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: May 30, 1978
    Assignee: Allied Chemical Corporation
    Inventors: Jan F. Van Peppen, William Bernard Fisher
  • Process for melt-spinning synthetic fibers
    Patent number: 4045534
    Abstract: An improved process and apparatus for production of synthetic multifilamentary yarns having uniform quality. The method comprises extruding a molten synthetic polymer downwardly through a spinneret, advancing the extruded filaments downwardly through a substantially stationary column of heated air, and subsequently advancing the filaments downwardly through a quenching zone wherein they are in contact with cooling air introduced into the path of the filaments under controlled conditions of air velocity and direction of flow.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: August 30, 1977
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Dong Wha Kim, Orin Wyatt Norwood, John Walter Showers, Eugene Addison Swanson, Gene Clyde Weedon
  • Testing and correcting metering accuracy of multihole spinnerets
    Patent number: 4001359
    Abstract: A method and apparatus for off-line testing and correcting the metering accuracy of a split multihole spinneret fed by a single metered stream by determining end to end variations in flow rate and by reworking a number of holes in the lower flow rate side of the split spinneret, calculated by multiplying the average test percent bias of the split spinneret by a predetermined constant, so as to bring end to end variations in flow rate to within a required accuracy.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: January 4, 1977
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Howard Lyle Helmer, David Pendlebury
  • Apparatus for melt-spinning synthetic fibers
    Patent number: 3936253
    Abstract: An improved process and apparatus for production of synthetic multifilamentary yarns having uniform quality. The method comprises extruding a molten synthetic polymer downwardly through a spinneret, advancing the extruded filaments downwardly through a substantially stationary column of heated air, and subsequently advancing the filaments downwardly through a quenching zone wherein they are in contact with cooling air introduced into the path of the filaments under controlled conditions of air velocity and direction of flow.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: February 3, 1976
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Dong Wha Kim, Orin Wyatt Norwood, John Walter Showers, Eugene Addison Swanson, Gene Clyde Weedon
  • Testing and correcting metering accuracy of multihole spinnerets
    Patent number: 3930775
    Abstract: A method and apparatus for off-line testing and correcting the metering accuracy of a split multihole spinneret fed by a single metered stream by determining end to end variations in flow rate and by reworking a number of holes in the lower flow rate side of the split spinneret, calculated by multiplying the average test percent bias of the split spinneret by a predetermined constant, so as to bring end to end variations in flow rate to within a required accuracy.
    Type: Grant
    Filed: September 19, 1974
    Date of Patent: January 6, 1976
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Howard Lyle Helmer, David Pendlebury