Patents by Inventor Lawrence C. Mitchell

Lawrence C. 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).

  • Publication number: 20140263831
    Abstract: A dimensionally size-efficient aircraft being of a twin-fuselage configuration that addresses long-range high-capacity passenger commercial or military application needs, unique in that propelling engines (two, three, or four engine arrangements) are centrally mounted aft of a central cross-wing section, that section addressing the structural requirements of fuselage attachment with a means of passage between fuselages, the outer main wings being free from hanging appendages, thereby enabling efficient aerodynamic-lift wing design, the configuration using a split stabilizer and a split vertical tail for stable aerodynamic control. Engine locations are biased high and aft with the central and outer wings providing ground noise abatement while in flight, passenger cabin noise low due to aft engine locations.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Inventor: Lawrence C. Mitchell, JR.
  • Patent number: 4942019
    Abstract: A system for purifying a gas provided with an apparatus comprising a main container defining a substantially closed chamber, an intake fitting having an intake projecting from the chamber and having inside the chamber a filter element, an outlet fitting having an outlet projecting from the chamber offset from the intake and having inside the chamber a filter element offset from the filter element of the intake fitting, and means defining in the chamber an internally sealed well between the filters. A baffle is provided in the chamber between the filters so that gas passing between the filters is deflected by the baffle. A heater is provided in the well. An outer container surrounds the main container and defines a space therearound. This space is insulated, either by being filled with an insulating material or by being evacuated.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: July 17, 1990
    Assignee: Ergenics, Inc.
    Inventors: Paul D. Goodell, Lawrence C. Mitchell, Sr.
  • Patent number: 4444117
    Abstract: A stacked tube submunitions dispenser (11) comprises an array (15) of nested launch tube clusters (23) disposed within a dispenser envelope (19). Each cluster (23) includes a plurality of fixed launch tubes (17) uniformly arranged around the central axis of the envelope (19) so that the angle between adjacent launch tubes (17) of a cluster (23) is substantially equal. The launch tubes (17) extend rearwardly and outwardly from the central axis from the envelope (19) in a substantially conical configuration. Each launch tube (17) includes a guide surface (33) for supporting a submunition (35) in a stowed position, a guide surface (37) for guiding the submunition during a dispensing event; and means for dispensing (39, 41) the submunition. Additionally, each launch tube includes a jettisonable aerodynamic cover (21) which provides the envelope (19) with a clean aerodynamic configuration. An additional volume (43) is available rearward of the submunition (35) but inside the envelope (19).
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: April 24, 1984
    Assignee: The Boeing Company
    Inventor: Lawrence C. Mitchell, Jr.
  • Patent number: 4286085
    Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a substituted pyridine or a salt of a substituted pyridine.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: August 25, 1981
    Assignee: General Electric Company
    Inventors: Donald B. G. Jaquiss, Victor Mark, Lawrence C. Mitchell
  • Patent number: 4201878
    Abstract: Bisphenols substantially free of by-products, are produced rapidly by reacting a phenol and a compound of the formulae: ##STR1## wherein R and R' are hydrogen, lower alkyl or aryl; X is lower alkoxy or the same as X'; Y is chlorine or the same as X; X' is aryloxy; Z is a 1,2- or 1,3-propylenedioxy (that may optionally carry hydroxy, lower alkyl or lower hydroxyalkyl substituents), or arylenedioxy radical; n is integer from three to nine; m is (n-1).
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: May 6, 1980
    Assignee: General Electric Company
    Inventors: Victor Mark, Lawrence C. Mitchell, Charles V. Hedges
  • Patent number: 4192954
    Abstract: A process is disclosed for the production of 2,2-bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, from by-products remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the by-products with phenol and adding anhydrous hydrogen chloride under superatmospheric pressure to the resulting mixture to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: March 11, 1980
    Assignee: General Electric Company
    Inventors: Henry P. Barker, Lawrence C. Mitchell
  • Patent number: 4188496
    Abstract: A process is disclosed for the production of 2,2-bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, from by-products remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the by-products with phenol and treating the resulting mixture with anhydrous hydrogen bromide to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: February 12, 1980
    Assignee: General Electric Company
    Inventors: Donald B. G. Jaquiss, Lawrence C. Mitchell
  • Patent number: 4180683
    Abstract: A process is disclosed for the recovery of 2,2-bis(4-hydroxyphenyl)propane, herein referred to as bisphenol-A, from residues remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the residues with phenol in the absence of acidic reagents to precipitate a bisphenol-A-phenol crystalline adduct and recovering bisphenol-A from the separated adduct.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: December 25, 1979
    Assignee: General Electric Company
    Inventor: Lawrence C. Mitchell
  • Patent number: 4171456
    Abstract: The title compound can be made by reacting ethylene glycol with hexabromo-p-xylene in the presence of anhydrous potassium carbonate. The compound is useful as a fire retardant for plastics, and can be used to form a polyester of the linear type. Fibers made from such polyesters are useful for making fire retardant textiles, carpets, drapes, and garments.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: October 16, 1979
    Assignee: Ethyl Corporation
    Inventors: David R. Brackenridge, Lawrence C. Mitchell
  • Patent number: 4146524
    Abstract: Novel thermoplastic molding compositions are disclosed which comprise a polycarbonate and a halocarbon oil, wax or grease.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: March 27, 1979
    Assignee: General Electric Company
    Inventors: Lawrence C. Mitchell, Steven W. Scott