Patents by Inventor Alfred Steininger

Alfred Steininger 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).

  • Process for the manufacture of homo- and copolymers of tetrafluoroethylene employing as the reducing agent in the redox catalyst an ayodicarboxylic acid, salt of ayocarboxylic acid, azodicarbonamide, or mixtures thereof
    Patent number: 4112211
    Abstract: Polymers on the basis of tetrafluoroethylene are produced in the presence of a redox system as catalyst consisting of a usual peroxidic compound as oxidizing component and a water-soluble nitrogen compound liberating in situ a diimine under the polymerization conditions. The polymers obtained can be processed, inter alia, into thick walled articles on a ram extruder or into large sintered block free from crack formation.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: September 5, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Kuhls, Alfred Steininger, Herbert Fitz
  • Process for the manufacture of suspension polymers of tetrafluoroethylene
    Patent number: 4078134
    Abstract: Polymers of tetrafluoroethylene are produced by suspension polymerization in the presence of small amounts of definite perfluorinated ethers. The products obtained have improved processing properties.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: March 7, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Kuhls, Alfred Steininger, Herbert Fitz
  • Process for the manufacture of paste-extrudable polymers of tetrafluoroethylene
    Patent number: 4058578
    Abstract: Modified tetrafluoroethylene dispersion polymers are prepared by polymerizing tetrafluoroethylene in the presence of perfluorinated vinyl ethers of the formula I ##STR1## as modification agent. The articles made from the polymers by paste-extrusion have improved mechanical and electrical properties even if the extrusion is carried out at a high reduction ratio and draw-off rate.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: November 15, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Kuhls, Thomas Martini, Alfred Steininger