Patents by Inventor Hans-Rudolf Meier

Hans-Rudolf Meier 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).

  • Ortho cyclohexyl, para hydroxy aralkanoic acid esters and amide antioxidants
    Patent number: 4699939
    Abstract: Compounds of formula I ##STR1## wherein R.sub.1, R.sub.2 and A are essentially hydrocarbyl or substituted hydrocarbyl groups with at least one of R.sub.1 and R.sub.2 being cyclohexyl, n is 0, 1 or 2, m is an integer of 1 to 4 and X is oxygen or --N(R.sub.3)-- wherein R.sub.3 is hydrogen, C.sub.1 -C.sub.4 alkyl or phenyl.
    Type: Grant
    Filed: October 8, 1986
    Date of Patent: October 13, 1987
    Assignee: Ciba-Geigy Corporation
    Inventors: Ivan Orban, Hans-Rudolf Meier, Paul Dubs, Samuel Evans, Peter Hofmann