Patents by Inventor Michael Anthony Neal

Michael Anthony Neal 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).

  • Molding of polypropylene with enhanced reheat characteristics
    Patent number: 7510751
    Abstract: Bottles, containers and other articles are formed from polypropylene compositions that include a reheating agent, such as antimony, carbon black, graphite, titanium, copper, manganese, iron, tungsten, graphite, infra-red absorbing dyes or other infra-red absorbing material. The reheating time for the polypropylene composition is shortened for injection stretch blow molding or thermoforming, and the polypropylene granule composition with reheating agent has an L* value of at least 80% of the L* value for a polypropylene granule control without added reheating agents as measured by the Gardner color test. The reheating agent may be incorporated into the polypropylene composition by in situ chemical reduction of a metal compound, such as antimony triglycolate, with a reducing agent, such as hypophosphorous acid. In addition, the polypropylene composition with reheating agent may be derived from a polypropylene masterbatch with high concentrations of reheating agent.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: March 31, 2009
    Assignee: INVISTA North America S.ar.l.
    Inventors: Michael Anthony Neal, David A. Harrison, Stephen Derek Jenkins, J. Paul Davis
  • Molding of polypropylene with enhanced reheat characteristics
    Patent number: 7303795
    Abstract: Bottles, containers and other articles are formed from polypropylene compositions that include a reheating agent, such as antimony, carbon black, graphite, titanium, copper, manganese, iron, tungsten, graphite, infra-red absorbing dyes or other infra-red absorbing material. The reheating time for the polypropylene composition is shortened for injection stretch blow molding or thermoforming, and the polypropylene granule composition with reheating agent has an L* value of at least 80% of the L* value for a polypropylene granule control without added reheating agents as measured by the Gardner color test. The reheating agent may be incorporated into the polypropylene composition by in situ chemical reduction of a metal compound, such as antimony triglycolate, with a reducing agent, such as hypophosphorous acid. In addition, the polypropylene composition with reheating agent may be derived from a polypropylene masterbatch with high concentrations of reheating agent.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: December 4, 2007
    Assignee: INVISTA North America S.a. r.l.
    Inventors: Michael Anthony Neal, David Anthony Harrison, Stephen Derek Jenkins, John Paul Davis