Patents by Inventor Ralph Thielemann

Ralph Thielemann 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).

  • Papermaking machine fabrics
    Patent number: 5736471
    Abstract: Papermaking machine fabrics, filters and reinforcing layers for elastomers, comprise monofilaments of copolymers containing 85 to 99 mol % of the structural repeat unit of the formula I ##STR1## 1 to 15 mol % of the structural repeat unit of the formula II--OC--R.sup.2 --CO--O--R.sup.3 --O-- (II),whereR.sup.1 is a radical of a dihydric aliphatic or cycloaliphatic alcohol or is derived from mixtures of such alcohols,R.sup.2 is a radical of an aliphatic, cycloaliphatic or monocyclic aromatic dicarboxylic acid or is derived from mixtures of such dicarboxylic acids,R.sup.3 assumes one of the definitions for R.sup.1, and the quantitative data are based on the total amount of the polymer.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: April 7, 1998
    Assignee: Hoechst Trevira GmbH & Co KG
    Inventors: Ralph Thielemann, Peter Klein, Rex Delker, Hans Wagner