Patents by Inventor Wolf Pfeifer

Wolf Pfeifer 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 5-arylidene hydantoins (B)
    Patent number: 4345072
    Abstract: 5-Arylidene hydantoins are produced by condensation of an aromatic aldehyde with hydantoin in the presence of at least one ammonium salt of an aliphatic or aromatic carboxylic acid. The desired 5-arylidene hydantoins are obtained in high yields.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: August 17, 1982
    Assignee: Degussa AG
    Inventors: Axel Kleemann, Theodor Lussling, Wolf Pfeifer, Paul Scherberich