Patents by Inventor Henry M. Schleinitz

Henry M. Schleinitz 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).

  • POLYESTER CLAY NANOCOMPOSITES FOR BARRIER APPLICATIONS
    Publication number: 20090186179
    Abstract: The present invention is a method for reducing the permeability of gases through polyester containers and films by incorporating into the polymer from which the container or film is formed an effective amount of exfoliated sepiolite-type clay.
    Type: Application
    Filed: March 23, 2009
    Publication date: July 23, 2009
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: DAVID T. WILLIAMSON, Henry M. Schleinitz, Richard Allen Hayes
  • Multistage annealing of aramide reverse osmosis membranes
    Patent number: 4601827
    Abstract: A process for forming a reverse osmosis membrane is disclosed. The process involves casting a solution of an aromatic polyamide and a modifying salt to form a layer which is dried and quenched with water to gel the aromatic polyamide, and annealed in water at 40.degree.-110.degree. C. and preferably 40.degree. to 90.degree. in a plurality of stages with the final stage being at more than 60.degree. C.
    Type: Grant
    Filed: September 27, 1984
    Date of Patent: July 22, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John J. Buckfelder, Henry M. Schleinitz
  • Supported reverse osmosis membranes
    Patent number: 4454176
    Abstract: Preparation of supported reverse osmosis membranes on a woven, unsized, porous support using dimethylacetamide solvent and a lithium nitrate or chloride or magnesium chloride salt.
    Type: Grant
    Filed: October 14, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John J. Buckfelder, Henry M. Schleinitz
  • Separation device of cordierite ceramic and .alpha.-alumina
    Patent number: 4251377
    Abstract: A ceramic filamentary structure particularly useful in ultrafiltration applications composed of cordierite ceramic and a quantity of .alpha.-alumina substantially in excess of that required to form the cordierite.
    Type: Grant
    Filed: August 28, 1979
    Date of Patent: February 17, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Henry M. Schleinitz
  • Process for low attenuation methacrylate optical fiber
    Patent number: 4161500
    Abstract: Low attenuation, all-plastic optical fiber is made by using starting materials which are rigorously purified to remove light-absorbing impurities and solid particles of dirt, polymerizing the core monomer under pressure with a heating schedule which leads to at least 98% conversion to polymer as a cylindrical preform, and ram extruding the core of the optical fiber while melting only the forward end of the preform of core polymer so as to preclude contamination of the core by dirt or formation of bubbles by polymer degradation. Optical fibers so made exhibit light attenuations as low as 300 dB/km or lower.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: July 17, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Henry M. Schleinitz, Paul G. Stephan
  • Low attenuation optical fiber of deuterated polymer
    Patent number: 4138194
    Abstract: Light-transmitting optical fiber having a core of a deuterated acrylate polymer exhibits remarkably high transmission of light in the visible and at certain wavelengths in the near-infrared region of the spectrum.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: February 6, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John K. Beasley, Richard Beckerbauer, Henry M. Schleinitz, Frank C. Wilson
  • Low attenuation optical fiber of deuterated polymer
    Patent number: RE31868
    Abstract: Light-transmitting optical fiber having a core of a .[.deuterated acrylate.]. polymer .Iadd.selected from the group consisting of a deuterated methacrylate homopolymer, a deuterated methacrylate copolymer and a deuterated methacrylate/acrylate copolymer which .Iaddend.exhibits remarkably high transmission of light in the visible and at certain wavelengths in the near-infrared region of the spectrum.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: April 16, 1985
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: John K. Beasley, Richard Beckerbauer, Henry M. Schleinitz, Frank C. Wilson