Patents by Inventor William J. Ehmann

William J. Ehmann 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).

  • Ionizable olefin based resinous tackifiers for latex
    Patent number: 4670504
    Abstract: There is provided a tackifier composition especially suited for use with natural rubber latex and formed from an olefin resin, preferably a polymerized terpene hydrocarbon resin condensed with an unsaturated carboxylic acid or anhydride, optionally partially esterified with a C.sub.1 -C.sub.30 alcohol or phenol, and neutralized with a base, preferably a volatile base such as an amine, and then dispersed in an aqueous medium. The tackifier when added to a latex forms compositions useful particularly as pressure sensitive adhesives.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: June 2, 1987
    Assignee: Sylvachem Corporation
    Inventors: Carlos G. Cardenas, James M. Evans, Charles J. Stark, William J. Ehmann
  • Process for the oxidation of primary allylic and benzylic alcohols
    Patent number: 4298762
    Abstract: Improved conversions of primary allylic and benzylic alcohols are obtained in an Oppenauer oxidation process, under Oppenauer oxidation conditions, by carrying out the oxidation employing furfural as the hydrogen acceptor. Primary alcohols to which the present invention relates are allylic alcohols substituted in at least the 2-position with a hydrocarbon radical and benzylic alcohols.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: November 3, 1981
    Assignee: SCM Corporation
    Inventors: William J. Ehmann, Walter E. Johnson, Jr.
  • Process for isomerizing cycloalkenol to cycloalkanone
    Patent number: 4160786
    Abstract: A beta-, gamma-unsaturated cycloalkenol contaminated with an acid-forming moiety is catalytically isomerized to a cycloalkanone in the presence of copper chromite catalyst and an insoluble base which suppresses the acid-forming moiety during the isomerization.
    Type: Grant
    Filed: August 11, 1978
    Date of Patent: July 10, 1979
    Assignee: SCM Corporation
    Inventor: William J. Ehmann
  • Process for the oxidation of primary allylic alcohols
    Patent number: 4055601
    Abstract: Improved conversions of 3-substituted and 3,3-disubstituted allyl alcohols to the corresponding aldehydes are obtained in an Oppenauer oxidation process, under Oppenauer oxidation conditions, by carrying out the oxidation employing furfural as the hydrogen acceptor. The invention is particularly applicable to the oxidation of geraniol and nerol to citral, which can be converted directly to pseudoionone without purification.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: October 25, 1977
    Assignee: SCM Corporation
    Inventor: William J. Ehmann
  • Selective hydrogenation of unsaturated compounds
    Patent number: 4020108
    Abstract: In a process for the catalytic hydrogenation of unsaturated compounds, which process is characterizable as employing for the active catalyst a glyoxime complexed with cobalt and a base, referred to as a cobaloxime catalyst, the improvement for obtaining increased conversion and/or yield comprising employing a large excess of the glyoxime complexing agent in the hydrogenation reaction. The invention is particularly applicable to the selective reduction of certain .alpha.,.beta.-unsaturated aliphatic ketones and is described with reference to the highly selective hydrogenation of carvone to dihydrocarvone.
    Type: Grant
    Filed: June 30, 1976
    Date of Patent: April 26, 1977
    Assignee: SCM Corporation
    Inventor: William J. Ehmann