Patents by Inventor Rudolph H. Michel

Rudolph H. Michel 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).

  • Extruder process for preparation of carbon fiber reinforced fluoropolymer compositions
    Patent number: 4422992
    Abstract: An extruder process for blending carbon fiber and tetrafluoroethylene copolymer resins, and laminates from the product of the process.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: December 27, 1983
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Rudolph H. Michel
  • Tetrafluoroethylene copolymer
    Patent number: 4414356
    Abstract: An intimate blend of a melt-fabricable tetrafluoroethylene copolymer resin and graphite reinforcing fibers having an untreated surface is obtained by intimately blending the resin and fibers in a mixture of water and a selected water-miscible organic solvent. Composites molded from the blend have good resistance to steam and alkali.
    Type: Grant
    Filed: February 10, 1983
    Date of Patent: November 8, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Rudolph H. Michel
  • Process for extruding a modified high molecular weight poly(ethylene terephthalate) resin
    Patent number: 4409167
    Abstract: Poly(ethylene terephthalate) resin and blends of poly(ethylene terephthalate) resin with other polymers are extruded while being coupled with an organic diisocyanate under conditions where carbon dioxide gas is vented smoothly, as it is formed. The extruder has a number of zones designed to perform specific functions. The temperature in the kneading zone and in the venting zone must be maintained at about 280.degree.-320.degree. C. to bring about rapid reaction and to permit efficient gas evolution and removal without thermally degrading the polymeric material. The extruded article is free of trapped gas bubbles and other imperfections. This process is particularly suitable for making PET billets, which then are stretched to form strapping useful in packaging applications.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: October 11, 1983
    Assignee: E. I. Du Pont de Nemours & Co,
    Inventors: Robert J. Kolouch, Rudolph H. Michel
  • Filled, biaxially oriented, thermoplastic film having preferential shrinkage and method of making such film
    Patent number: T981003
    Abstract: a filled, biaxially oriented, void-containing thermoplastic film suitable for making heat-shrinkable bands is provided having shrinkage on heating to 100.degree. C. of greater than 5%, which shrinkage in turn is at least 5% greater than the shrinkage in a direction perpendicular thereto.A process for preparing this film with its preferential shrinkage is provided including the steps of:(a) melt-blending a C.sub.2 -C.sub.10 .alpha.
    Type: Grant
    Filed: July 11, 1978
    Date of Patent: April 3, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lester R. Bartron, Samuel P. Anderson, Rudolph H. Michel