Patents by Inventor Leo Ernst Manzer

Leo Ernst Manzer 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).

  • Gas phase synthesis of methylene lactones using novel catalyst
    Patent number: 7164033
    Abstract: Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 16, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Keith W. Hutchenson, Kostantinos Kourtakis, Leo Ernst Manzer