Patents by Inventor Agnes Bourrel

Agnes Bourrel 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 production of five-membered or six-membered cyclic ethers, in particular of anhydropolyols
    Patent number: 6013812
    Abstract: The present invention relates to a process for the production of five-membered or six-membered cyclic ethers, in particular of anhydropolyols, by acid-catalysed cyclodehydration of polyols that contain at least two hydroxyl groups with a spacing enabling ring formation--that is to say, preferably with a spacing of 4 or 5 C atoms. The invention is directed in particular towards the production of anhydrotetritols, anhydropentitols and, particularly preferred, anhydrohexitols, from tetritols, pentitols and hexitols, respectively.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 11, 2000
    Assignee: Degussa Aktiengesellschaft
    Inventors: Thomas Haas, Olaf Burkhardt, Marcus Morawietz, Rudolf Vanheertum, Agnes Bourrel