Patents by Inventor Rolf Studer

Rolf Studer 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).

  • Removal of volatile organic compounds from polymer dispersions
    Patent number: 6740691
    Abstract: A process for treating an aqueous polymer latex/dispersion of synthetic polymers prepared by polymerizing one or more monomeric materials for at least 80%, involving: A. adding to the polymer latex/dispersion a sufficient amount of at least one reducing agent in one or more portions followed by adding at least one free radical generator in such a way that at least the bulk of the reducing agent has been added before addition of free radical generator is started and maintaining the mixture at a suitable temperature for a period of time which is sufficient to reduce the VOC-level of the latex/dispersion to decrease to below 1,500 ppm, preferably to below 1,000 ppm after which B. water vapor and/or gas is/are sparged into the latex/dispersion while the temperature of the latex/dispersion is maintained at a suitable temperature for a period of time which is sufficient to decrease the VOC-level to below 200 ppm, preferably to below 50 ppm, most preferably to below 15 ppm.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: May 25, 2004
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: Johanna Maria Sophia Lorteije, Markus Aurelius Von Arx, Rolf Studer, Petrus Leonardus Swinkels
  • Synthesis of thymosin .alpha..sub.1 and desacetyl thymosin .alpha..sub.1
    Patent number: 4504415
    Abstract: An improved solution phase synthesis of thymosin .alpha..sub.1 and desacetyl thymosin .alpha..sub.1 with t-Boc side chain protection and proceeding through novel intermediates is disclosed.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: March 12, 1985
    Assignee: Hoffman-La Roche Inc.
    Inventors: Arthur M. Felix, Dieter Gillessen, Rolf Studer, Johannes A. Meienhofer, Arnold Trzeciak
  • L-Pyroglutamyl-L-histidyl-L-prolyl-beta-alaninamide and salts
    Patent number: 4066635
    Abstract: This disclosure relates to L-pyroglutamyl-L-histidyl-L-prolyl-beta-alaninamide and acid addition salts thereof as anti-depressant agents.
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: January 3, 1978
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Dieter Gillessen, Rolf Studer, Arnold Trzeciak