Patents by Inventor James M. Marshall

James M. Marshall 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: 20090166910
    Abstract: This invention provides a system and method for forming a fibrous porous ceramic substrate that employs a screw extruder, and illustratively, a twin screw extruder to form a substrate by directing a homogeneous, wetted and mixed group of substrate components through a screw extruder die under pressure. The components of the mixture can be initially mixed in a substantially dry state by an appropriate mixer to form a homogeneous powder with a high dispersal of materials therein. The powder can be continuously mixed and conveyed to a feeder of the extruder. Along the path of the extruder, fluid can be introduced at a metered rate, along with other additives, such as colloidal silica (glass binder). The extruder's twin, co-rotating shafts include a combination of screw elements for feeding the mixture and shear-inducing mixing elements (kneading blocks) for thoroughly mixing fluid into the dry components.
    Type: Application
    Filed: January 6, 2009
    Publication date: July 2, 2009
    Applicant: GEO2 TECHNOLOGIES, INC.
    Inventors: James M. Marshall, James Jenq Liu
  • Patent number: 5926758
    Abstract: Methods and apparatus are disclosed which allow many satellites (A1-M, B1-N) in a plurality of Systems (A, B) to use the same radio frequencies (f1-n) so long as there is no interference between radio signals. The methods compute times (t) when satellite radio signals (32, 36) have overlapping reception areas or "footprints" (30, 35) on the Earth's surface (E) whereby a user's reception or transmission of a message would be interfered unless different frequencies (f1-n) are used for the "competing" signals. The methods use a timing algorithm that does not allow two satellites (Ai, Bi) which are "visible" at the same point on the Earth (E) to transmit on the same frequency (fi). In one preferred embodiment, a timing algorithm (48) produces a radio frequency use schedule (49) computed on the Earth from orbital data maintained in an ephemeris (46) of satellite communications systems (A, B) which communicate on frequencies (f1-n) giving rise to interfering radio signals.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: July 20, 1999
    Assignee: Leo One IP, L.L.C.
    Inventors: David P. Grybos, James M. Marshall
  • Patent number: 5094488
    Abstract: A deadbolt latch assembly includes a cylindrical latch housing containing a pair of ear tabs for engagement with either of a rectangular or circular faceplate assembly, depending upon the requirements of the door in which the latch assembly is to be mounted. The rectangular faceplate assembly includes a backing plate for rotary engagement with the ear tube, while the circular faceplate assembly includes a pair of elongated slots for slidably engaging the ear tabs and a groove for accepting a retainer ring which holds the ear tabs in place.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: March 10, 1992
    Assignee: Medeco Security Locks, Inc.
    Inventors: William D. Boadwine, James M. Marshall
  • Patent number: D337922
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: August 3, 1993
    Inventor: James M. Marshall