Patents by Inventor Peter Roas

Peter Roas 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).

  • Polyether based preparations and the use thereof
    Patent number: 6919386
    Abstract: The invention relates to preparations, containing (A) 30 to 56 wt.-% aziridino polyethers with a cyclic polyether content lower than 5.0 wt.-%; (B) 30 to 45 wt.-% compounds which effect a softening of the cured dental materials; (C) 10 to 15 wt.-% filler; (D) 4 to 10 wt.-% further active ingredients; with the provisos that the weight ratio between constituents (A) and (C) to the compounds of constituent (B) is 1.2 to 2.1; constituent (B) consists of compounds with molar masses lower than 500 g/mol (B1) and of trisacylesters of glycerol of non-animal origin with molar masses between 500 to 2000 g/mol (B2) as well as of compounds with molar masses greater than 2000 g/mol (B3) and the weight ratio between (B1) and (B3) is 1:0.8 to 1:2.3, as well as their use.
    Type: Grant
    Filed: January 15, 2001
    Date of Patent: July 19, 2005
    Assignee: 3M ESPE AG
    Inventors: Erich Wanek, Gunther Eckhardt, Peter Roas
  • Polyether based preparations and the use thereof
    Publication number: 20030109596
    Abstract: The invention relates to preparations, containing
    Type: Application
    Filed: July 17, 2002
    Publication date: June 12, 2003
    Inventors: Erich Wanek, Gunther Eckhardt, Peter Roas