Patents by Inventor Reinhard Sappelt

Reinhard Sappelt 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 the Schiff's bases of 2,6-dichloro-5-hydroxy-aniline
    Patent number: 4394521
    Abstract: Process for the production of 2,6-dichloro-5-hydroxy-anils having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and each is an alkyl radical having 1 to 4 carbon atoms, by the conversion of 2,4-dichloro-3-aminophenol with a ketone. The reaction is conducted at a temperature of 0.degree. to 50.degree. C.
    Type: Grant
    Filed: April 28, 1981
    Date of Patent: July 19, 1983
    Assignee: Lonza-Werke G.m.b.H.
    Inventor: Reinhard Sappelt