Patents by Inventor Martin Gerald Wagner

Martin Gerald Wagner 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).

  • Melt spun fibers from blends of poly(tetrafluoroethylene) and poly(tetrafluoroethylene-co-perfluoro-alkylvinyl ether)
    Patent number: 6436533
    Abstract: The present invention relates to melt spun fibers prepared from blends of poly(tetrafluoroethylene) and poly(tetrafluoroethylene-co-perfluoro-alkylvinyl ether).
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: August 20, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Glenn William Heffner, William Cheng Uy, Martin Gerald Wagner
  • MELT SPUN FIBERS FROM BLENDS OF POLY (TETRAFLUOROETHYLENE) AND POLY (TETRAFLUOROETHYLENE-CO-PERFLUORO-ALKYLVINYL ETHER)
    Publication number: 20020061398
    Abstract: The present invention relates to melt spun fibers prepared from blends of poly(tetrafluoroethylene) and poly(tetrafluoroethylene-co-perfluoro-alkylvinyl ether).
    Type: Application
    Filed: June 28, 2001
    Publication date: May 23, 2002
    Inventors: Glenn William Heffner, William Cheng Uy, Martin Gerald Wagner
  • Melt spun fluoropolymeric fibers and process for producing them
    Patent number: 6207275
    Abstract: This invention pertains to melt spun fibers of copolymers formed from tetra-fluoro ethylene and perfluorovinyl monomers and a process for their formation. In the process of this invention fibers exhibiting high strength and low shrinkage are drawn from the melt at SSFs of at least 500×.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: March 27, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Glenn William Heffner, William Cheng Uy, Martin Gerald Wagner
  • Melt spun fluoropolymeric fibers and process for producing them
    Patent number: 6048481
    Abstract: This invention pertains to melt spun fibers of copolymers formed from tetra-fluoro ethylene and perfluorovinyl monomers and a process for their formation. In the process of this invention fibers exhibiting high strength and low shrinkage are drawn from the melt at SSFs of at least 500.times..
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: April 11, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Glenn William Heffner, William Cheng Uy, Martin Gerald Wagner
  • Compositions and assemblies of high-melting perfluoroplastic materials
    Patent number: 5874171
    Abstract: A composition comprising a high-melting perfluoroplastic swollen at a swelling temperature to the extent of at least one percent with a solution of a second, lower-melting perfluoropolymer in a solvent; and an assembly made by contacting said swollen perfluoroplastic material with a surface of an interlayer at a first temperature, contacting another surface of the interlayer with a substrate and applying pressure to cause the interlayer to adhere to both the perfluoroplastic and the substrate and thus form an assembly, and heating the assembly to a second temperature.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: February 23, 1999
    Assignee: E. I. duPont de Nemours and Company
    Inventor: Martin Gerald Wagner
  • Asymmetric membranes of polytetrafluoroethylene and process for making them
    Patent number: 5653882
    Abstract: This invention relates to methods for preparing membranes of polyfluoroethylene (PTFE) and to the asymmetric membranes fabricated thereby. Such membranes are useful as separation and ultrafiltration membranes. The membranes are produced as a single layer. Method steps including contacting a substrate with a solution of PTFE in a perfluorinated cycloalkane solvent at a high temperature to cause a film of such solution to be coated on the substrate, removing the coated substrate from the solution and rapidly cooling it by contact with a second solvent, removing the coated substrate from the second solvent, drying the film, and optionally separating film from substrate.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: August 5, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arthur Zenker Moss, Martin Gerald Wagner, Raymond Richard Zolandz