Patents by Inventor Wolfram VON Langenthal

Wolfram VON Langenthal 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).

  • Marking of articles
    Patent number: 3936556
    Abstract: A process for identifying manufactured articles in which a marking agent such as a homo- or copolymer of polymerizable ethylenically unsatured monomers is applied to the articles. Said homo- or copolymer contains at least one group which can be split off to form a low molecular weight compound such as an amine or phenol, which can be converted into dyes, said dyes being used to identify the manufactured articles.
    Type: Grant
    Filed: February 13, 1974
    Date of Patent: February 3, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Carlhans Suling, Hans Theidel, Hellmut Striegler, Wolfram VON Langenthal