Patents by Inventor Reinhart Mayer

Reinhart Mayer 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 viscoses
    Patent number: 4342600
    Abstract: The invention provides a process for the manufacture of viscoses from hemicellulose-containing cellulose pulps without requiring dialysis equipment. By addition of substances having a cross-linking or blocking action on the active groups of hemicellulose to the pulp before or during steeping it is possible to reduce the use of NaOH and CS.sub.2 in the manufacture of viscoses.The viscoses so obtained are distinguished by good filterability and low content of compounds causing formation of H.sub.2 S in the spinning process.
    Type: Grant
    Filed: January 2, 1981
    Date of Patent: August 3, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Reinhart Mayer, Walter Fester, Rolf Kleber
  • Process for improving the filterability of viscoses
    Patent number: 4340429
    Abstract: The invention provides a process for improving the solution state (filterability) of viscoses, wherein mashing of the alkali cellulose-xanthate with dilute sodium hydroxide solution or water and/or dissolving of the xanthate by agitation, disintegration or pump circulation etc. is carried out under an overpressure of from about 1 to 30 bar.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: July 20, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Reinhart Mayer
  • Use of modified cellulose hydrate fibers in the manufacture of bonded non-woven fabrics and products prepared in this manner
    Patent number: 4336299
    Abstract: This invention relates to a bonded non-woven fabric capable of absorbing water vapor, containing fibers of cellulose hydrate modified by at least one organic polymeric compound, either solely or blended with synthetic, natural or regenerated fibers.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: June 22, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Arno Holst, Reinhart Mayer, Wilhelm Fischer