Patents by Inventor Francis Mutterer

Francis Mutterer 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).

  • Stabilisation of polyphenylene ethers with macrocyclic polyalkylpiperidine compounds
    Patent number: 5004759
    Abstract: Macrocyclic polyaminotriazines containing tetramethylpiperidine side groups are suitable for use as stabilisers, in particular against degradation by UV light, for polyphenylene ethers. They have the advantage that they do not impair, or impair only to an insignificant degree, the dimensional stability under heat of these polymers.
    Type: Grant
    Filed: June 28, 1988
    Date of Patent: April 2, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Francis Mutterer, Kurt Berger
  • Process for the manufacture of bromopyridines
    Patent number: 3974166
    Abstract: A novel process for the preparation of 2,4-dibromo-, 2,6-dibromo- and 2,4,6-tribromopyridines, and the new bromopyridines to be obtained therewith, are disclosed. The novel process comprises treating 2,4-dichloro-, 2,6-dichloro- and 2,4,6-trichloropyridines, in an anhydrous organic medium, with gaseous HBr at temperatures between 80.degree. and 130.degree.C, said process being both simple and economical.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: August 10, 1976
    Assignee: Ciba-Geigy Corporation
    Inventor: Francis Mutterer
  • Process for the production of polyhalogenated nicotinic acids
    Patent number: 3956340
    Abstract: A novel process for preparing 2,6-dichloro- and 2,5,6-trichloronicotinic acid is disclosed which comprises reacting 2,6-dichloro-3-chloromethylpyridine and 2,5,6-trichloro-3-chloromethylpyridine, respectively, with concentrated nitric acid in the presence of concentrated sulphuric acid and a metal salt catalyst. This process is both simple and economical; it is distinguished by high yields and low reaction temperatures while avoiding undesirable side-reactions.
    Type: Grant
    Filed: March 13, 1974
    Date of Patent: May 11, 1976
    Assignee: Ciba-Geigy Corporation
    Inventor: Francis Mutterer