Patents by Inventor Joseph L. Mitchell

Joseph L. Mitchell 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).

  • HIGH GLOSS, ABRASION RESISTANT THERMOPLASTIC ARTICLE
    Publication number: 20210355294
    Abstract: The invention relates to a thermoplastic composition used for forming articles having both high gloss and excellent resistance to mar, scratch and/or abrasion. The composition contains very high levels of nano-sized inorganic additives, such as alumina, silica and titanium dioxide. Acrylic polymer compositions, such as Arkema's PLEXIGLAS® resins, with 5 to 25 weight percent of sized fumed silica are a preferred embodiment of the invention, especially when combined with a dye or pigment.
    Type: Application
    Filed: January 16, 2018
    Publication date: November 18, 2021
    Inventors: Charles C. CRABB, Robert J. BARSOTTI, Joseph L. MITCHELL, Samuel SCHULTE, Brian M. CROMER, Jing-Han WANG
  • Gas supply system for a powder-fluidizing apparatus
    Patent number: 7361227
    Abstract: A coating apparatus includes a container and a perforated plate separating a plenum from a coating chamber. A gas supply system delivers a gas to the plenum in a sufficient amount for passage of the gas through the plate and suspension of a powder in a fluidized condition in the chamber. The gas supply system preferably includes a primary portion for continuously delivered gas and a controllable pulsing portion for supplementing the gas from the primary portion. In a first mode of operation, the gas from the pulsing portion is cycled to provide variation in the fluidized volume. In a second mode, the pulsing portion delivers relatively long pulses of gas to mix the fluidized powder.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: April 22, 2008
    Assignee: Arkema, Inc.
    Inventor: Joseph L. Mitchell
  • Powder coatings from mixtures of thermoplastic vinylidene fluoride based resins and polyamide resins
    Patent number: 6083627
    Abstract: Pigmented and unpigmented polymeric resin blends containing up to 45 weight percent polyvinylidene fluoride based polymer and either polyamide 11 or polyamide 12 having particular usefulness in powder coating of objects are disclosed.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: July 4, 2000
    Assignee: Elf Atochem North America, Inc.
    Inventors: Brian D. Keeny, Joseph L. Mitchell, David T. Wiggins
  • Powder coatings from mixtures of thermoplastic vinylidene fluoride based resins and polyamide resins
    Patent number: 6018000
    Abstract: Pigmented and unpigmented polymeric resin blends containing up to 45 weight percent polyvinylidene fluoride based polymer and either polyamide 11 or polyamide 12 having particular usefulness in powder coating of objects are disclosed.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: January 25, 2000
    Assignee: Elfatochem North America, Inc
    Inventors: Brian D. Keeny, Joseph L. Mitchell, David T. Wiggins