Patents by Inventor Fred R. Gerns

Fred R. Gerns 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 preparation of 2-(2-bromo-2-nitroethenyl)furan
    Patent number: 5138076
    Abstract: Bromonitroethenylfuran (BNEF) is prepared from furfural in a two-step process. A primary amine is reacted with furfural in an organic solvent at the reflux temperature of the solvent to form the Schiff base. The organic solvent and the water formed in the foregoing reaction are removed from the Schiff base, which is then dissolved in a polar, water-miscible solvent. Bromonitromethane is added to the Schiff base solution and reacts with the Schiff base to form BNEF, which can be readily isolated by precipitation.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: August 11, 1992
    Assignee: Great Lakes Chemical Corporation
    Inventors: Fred R. Gerns, Larry D. Timberlake
  • Process for preparation of 2,5-dibromo-p-xylene
    Patent number: 3932542
    Abstract: Selective bromination process for 2,5-dibromo-p-xylene which comprises bromination of p-xylene using approximately stoichiometric amounts of bromine and a hydrated iron containing bromination catalyst to give selectively high yields of substantially pure 2,5-dibromo-p-xylene.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: January 13, 1976
    Assignee: Great Lakes Chemical Corporation
    Inventor: Fred R. Gerns