Patents by Inventor Michael Hirn

Michael Hirn 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).

  • Preparation of polyurethane foams
    Patent number: 6696505
    Abstract: Polyurethane foams are prepared by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, by a process in which the polyisocyanates a) are aliphatic di- or polyisocyanates and the compounds having at least two hydrogen atoms reactive with isocyanate groups b) contain at least one acrylate polyol.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: February 24, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Bruchmann, Horst Binder, Heinz-Dieter Lutter, Michael Hirn
  • Preparation of polyurethane foams
    Publication number: 20020035165
    Abstract: Polyurethane foams are prepared by reacting
    Type: Application
    Filed: July 18, 2001
    Publication date: March 21, 2002
    Inventors: Bernd Bruchmann, Horst Binder, Heinz-Dieter Lutter, Michael Hirn
  • Preparation of cyclic acetals or ketals
    Patent number: 5917059
    Abstract: Cyclic acetals or ketals are prepared by reacting a polyol with the appropriate aldehydes or ketones, with part of the aldehyde or ketone being distilled out during the reaction.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: June 29, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernd Bruchmann, Karl Haberle, Helmut Gruner, Michael Hirn