Patents by Inventor Mark L. Shannon

Mark L. Shannon 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).

  • Patent number: 4835321
    Abstract: A process for preparing an alkoxylation catalyst in which the catalyst pre-mix is formed by admixing an alkoxylated alcohol with a calcium containing compound which is dispersible in the alkoxylated alcohol, an inorganic acid and an aluminum trialkoxide, the pre-mix being heated to a temperature and for a time sufficient to effect at least partial exchange reaction betweeen the alkoxide groups of the aluminum alkoxide and the hydroxyl groups of the alkoxylated alcohol. There is also disclosed and claimed an alkoxylation process utilizing the catalysts formed as described above.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: May 30, 1989
    Assignee: Vista Chemical Company
    Inventors: Bruce E. Leach, Mark L. Shannon, Donald L. Wharry
  • Patent number: 4775653
    Abstract: A process for preparing an alkoxylation catalyst in which the catalyst pre-mix is formed by admixing an alkoxylated alcohol with a calcium containing compound which is dispersible in the alkoxylated alcohol, an inorganic acid and an aluminum trialkoxide, the pre-mix being heated to a temperature and for a time sufficient to effect at least partial exchange reaction between the alkoxide groups of the aluminum alkoxide and the hydroxyl groups of the alkoxylated alcohol. There is also disclosed and claimed an alkoxylation process utilizing the catalysts formed as described above.
    Type: Grant
    Filed: April 28, 1987
    Date of Patent: October 4, 1988
    Assignee: Vista Chemical Company
    Inventors: Bruce E. Leach, Mark L. Shannon, Donald L. Wharry
  • Patent number: 4529778
    Abstract: A process for preparing aromatic-moiety-containing polymers having modified physical properties is disclosed. Briefly, the process comprises reacting in the presence of a Friedel-Crafts catalyst: (a) a suitable aromatic-moiety containing polymer resin and (b) a homopolymer of .omega.-halo-.alpha.-olefins, or co- or terpolymer of .omega.-halo-.alpha.-olefins with other .alpha.-olefins and/or ethylene.
    Type: Grant
    Filed: September 22, 1983
    Date of Patent: July 16, 1985
    Assignee: Conoco Inc.
    Inventor: Mark L. Shannon
  • Patent number: 4525468
    Abstract: High activity catalysts for the polymerization of ethylene and other .alpha.-olefins are made by contacting a soluble magnesium compound of the general formula Mg(OSiR.sup.1 R.sup.2 R.sup.3).sub.2, wherein each of R.sup.1, R.sup.2, and R.sup.3 is, independently, alkyl, alkoxy or aryl with a metal alkoxide, or a mixture of a titanium tetraalkoxide with an alkoxide of another transition metal, in a saturated aliphatic hydrocarbon solution, followed by chlorination and precipitation by a suitable chlorinating agent. These catalysts show high activity for the polymerization of ethylene, especially under slurry polymerization conditions.
    Type: Grant
    Filed: April 28, 1983
    Date of Patent: June 25, 1985
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mark P. Mack, Mark L. Shannon
  • Patent number: 4440869
    Abstract: High activity catalysts for the polymerization of ethylene and other .alpha.-olefins are made by contacting a soluble magnesium compound of the general formula Mg(OSiR.sub.3).sub.2, wherein each R is, independently, alkyl, alkoxy or aryl, with a titanium tetralkoxide (titanate) in a saturated aliphatic hydrocarbon solution, followed by chlorination and precipitation by a suitable chlorinating agent. These catalysts show high activity for the polymerization of ethylene under slurry polymerization conditions.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: April 3, 1984
    Assignee: Conoco Inc.
    Inventors: Mark L. Shannon, Mark P. Mack
  • Patent number: 4424308
    Abstract: A process for preparing aromatic-moiety-containing polymers having modified physical properties is disclosed. Briefly, the process comprises reacting in the presence of a Friedel-Crafts catalyst: (a) a suitable aromatic-moiety containing polymer resin and (b) a homopolymer of .omega.-halo-.alpha.-olefins, or co- or terpolymer of .omega.-halo-.alpha.-olefins with other .alpha.-olefins and/or ethylene.
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: January 3, 1984
    Assignee: Conoco Inc.
    Inventor: Mark L. Shannon
  • Patent number: 4397764
    Abstract: A polymer-supported ethylene polymerization catalyst prepared by a method comprising (a) a polymer supported titanium-based catalyst consisting of(1) a polymer resin containing an amino borane reducing agent;(2) a titanium tetrahalide;(3) and a suitable organometallic and/or organic metallic co-catalyst.The polymers produced are resins of high density and melting point.
    Type: Grant
    Filed: March 26, 1982
    Date of Patent: August 9, 1983
    Assignee: Conoco Inc.
    Inventor: Mark L. Shannon