Patents by Inventor Gregory S. Williams

Gregory S. Williams 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).

  • Publication number: 20240091021
    Abstract: An orthopaedic implant includes: a porous ingrowth material body including a porous ingrowth material including a polymer and configured to be implanted within the spine of a human or a non-human animal, the material body comprising a top surface and a bottom surface and a through-hole extending through the material body from the top surface to the bottom surface, the material body having at least one pin opening that extends from the top surface toward the bottom surface; and at least one pin placed in the at least one pin opening.
    Type: Application
    Filed: November 30, 2023
    Publication date: March 21, 2024
    Applicant: SMed-TA/TD, LLC
    Inventors: Gregory C. Stalcup, Paul S. Nebosky, Kreigh R. Williams
  • Patent number: 11918478
    Abstract: A method of manufacturing multiple orthopaedic implants includes: producing a strip of material including a composite of a first porous ingrowth material and a second porous ingrowth material; forming a plurality of through-openings in the strip; and cutting a plurality of implant blanks from the strip, each of the implant blanks including at least one of the formed through-openings.
    Type: Grant
    Filed: August 2, 2021
    Date of Patent: March 5, 2024
    Assignee: SMed-TA/TD, LLC
    Inventors: Gregory C. Stalcup, Paul S. Nebosky, Kreigh R. Williams
  • Patent number: 5401892
    Abstract: A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is disclosed wherein the orthotolylpentene or phenylhexane is cyclized to the dimethyltetralin using an ultra-stable crystalline aluminosilicate molecular sieve Y-zeolite.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: March 28, 1995
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Ian C. Zaenger, Joyce D. Lamb, Gregory S. Williams
  • Patent number: 5284987
    Abstract: A method for the acid catalyzed cyclization of an alkenylbenzene feedstock to a dimethyltetralin in a liquid phase reaction wherein the desired dimethyltetralin is removed from the reaction mixture by distillation simultaneously with the addition of the feedstock to the reaction mixture.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: February 8, 1994
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Ian C. Zaenger, Gregory S. Williams
  • Patent number: 5118892
    Abstract: A method for preparing one or more diemthylnaphthalenes from one or more dimethyltetralins, and optionally for preparing one or more other specific dimethylnaphthalenes by isomerization of the aforesaid dimethylnaphthalene(s) is disclosed.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: June 2, 1992
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Ian C. Zaenger, Gregory S. Williams
  • Patent number: 5073670
    Abstract: A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1-or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is disclosed.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: December 17, 1991
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Joyce D. Lamb, Ian C. Zaenger, Gregory S. Williams
  • Patent number: 5034561
    Abstract: A method is provided for cyclizing an alkenylbenzene to a dialkyltetrahydronaphthalene (dialkyltetralin) in the presence of a solid cyclization catalyst constituted by a relatively low acidity, ultrastable, hydrogen form of crystalline aluminosilicate zeolite Y having a sodium oxide-to-alumina bulk molar ratio in the range of about 0.001 to about less than 1, a unit cell size no greater than about 24.3 Angstroms, and a sodium content of no more than about 0.4 percent by weight, calculated as elemental sodium and based on the weight of the zeolite. This catalyst provides more activity, more stability, higher product purity, and higher product yields than known prior art zeolite cyclization catalysts notwithstanding its relatively lower acidity. A preferred alkenylbenzene is 5-(o-tolyl)-pent-2-ene which is converted in relatively high yields and relatively high selectivities to 1,5 dimethyltetrahydronaphthalene.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: July 23, 1991
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Gregory S. Williams, Ian C. Zaenger
  • Patent number: 5030781
    Abstract: A method for preparing one or more specific dimethyltetralins by cyclization of either 5-(o-, m, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, with additional cyclization treatment, and optionally cracking, of a heavy fraction of the cyclization product, is disclosed.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: July 9, 1991
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Ian C. Zaenger, Gregory S. Williams
  • Patent number: 5012024
    Abstract: A method for preparing one or more dimethylnaphthalenes from one or more dimethyltetralins, and optionally for preparing one or more other specific dimethylnaphthalenes by isomerization of the aforesaid dimethylnaphthal-dimethylnaphthalene(s) is disclosed.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: April 30, 1991
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Ian C. Zaenger, Gregory S. Williams
  • Patent number: 4999326
    Abstract: A reactivation process for a deactivated supported palladium catalyst involves contacting the catalyst with an organic polar solvent for naphthalenic compounds at a temperature below about 200.degree. C. The organic polar solvent has a dielectric constant at 25.degree. C. in the range of about 4 to about 80 and has a boiling point at atmospheric pressure in the range of about 30.degree. C. to about 230.degree. C. Preferred organic polar solvents are acetone and methanol, as well as mixtures thereof.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: March 12, 1991
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Ian C. Zaenger, Gregory S. Williams
  • Patent number: 4962260
    Abstract: A method is disclosed for preparing one of more specific dimethylnaphthalene isomers by the isomerization of one or more other specific dimethylnaphthalene isomers in the liquid phase and in the presence of a solid zeolitic isomerization catalyst.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: October 9, 1990
    Assignee: Amoco Corporation
    Inventors: David Sikkenga, Ian C. Zaenger, Gregory S. Williams
  • Patent number: 4950825
    Abstract: A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is disclosed.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: August 21, 1990
    Assignee: Amoco Corporation
    Inventors: David L. Sikkenga, Joyce D. Lamb, Ian C. Zaenger, Gregory S. Williams