Patents by Inventor Jobst Leupold

Jobst Leupold 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).

  • Stilbene-based materials, their preparation and use
    Patent number: 5563298
    Abstract: Materials of the formula I: ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 in each case independently of one another can be identical or different and are a hydrogen atom, halogen atom, hydroxyl group, nitro group, cyano group or monovalent, optionally substituted organic radical; R.sub.4 is a hydrogen atom, halogen atom, nitro group, cyano group or monovalent, optionally substituted organic radical; and R.sub.5 can be identical or different and is a halogen atom, hydroxyl group, nitro group, cyano group or monovalent, optionally substituted organic radical.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: October 8, 1996
    Assignee: Consortium f ur elektrochemische Industrie GmbH
    Inventors: Hans-Peter Weitzel, Horst Leigeber, Peter Boldt, Jobst Leupold