Patents by Inventor Brian L. Simpson

Brian L. Simpson 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).

  • Patent number: 5578173
    Abstract: A method of removing dimethyl terephthalate (DMT) from a vapor stream. The vapor stream includes dimethyl terephthalate (DMT), methylhydroxyethyl terephthalate (MHET), glycols and methanol. A distillation column is held under an elevated pressure of 100 to 500 kPag and at a temperature of at least 85.degree. C. It has (i) a plurality of distillation trays; (ii) methanol liquid sprays between the trays; (iii) a main spray zone below the trays and (iv) a liquid pool of methanol in the bottom of the column. The vapor stream is directed into the distillation column, above the liquid pool and below the main spray zone, thereby forming a stream of liquid and vapor. The stream of liquid is directed away from the distillation column walls and into the liquid pool at the bottom of the column.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: November 26, 1996
    Assignee: Eastman Kodak Company
    Inventors: Walter E. Toot, Jr., Brian L. Simpson, Bruce R. Debruin, Andrius A. Naujokas, William J. Gamble
  • Patent number: 5364418
    Abstract: A process is disclosed for forming compacted silver nitrate bodies. A feed silver nitrate solution is introduced into an evaporative crystallizer (10). Steam is provided to a steam jacket (30) to heat the solution in the crystallizer (10) and form a slurry comprising silver nitrate crystals. The crystallizer (10) has an agitator (20) to mix the slurry and promote crystal growth. Slurry density is maintained within a desired range by controlling the rate of steam flow to the steam jacket (30) via a control valve (34). Slurry containing silver nitrate crystals is withdrawn from the crystallizer (10) and introduced to a centrifuge separator (78), for separating and drying the crystals. The separated, dried crystals are further dried by contact with an airstream and fall into a hopper (88). The crystals flow from the hopper into a translucent feed tube (96) and then into a roll compactor (100) that compacts the crystals to form the compacted silver nitrate bodies.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: November 15, 1994
    Assignee: Eastman Kodak Company
    Inventors: Ralph H. Pelto, Brian L. Simpson, Theodore E. Walker, John W. Crevelling, Kevin M. Logsdon, Paul C. Drake, Jeffrey R. Hennenkamp
  • Patent number: 5360602
    Abstract: Silver nitrate crystals comprising a substantially non-platelet crystal morphology are disclosed. The non-platelet silver nitrate crystals have an aspect ratio in the range of from about 1:2:3 to about 1:1:1. FIGS. 4 and 5.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: November 1, 1994
    Assignee: Eastman Kodak Company
    Inventors: Jeffrey R. Hennenkamp, Kevin M. Logsdon, Brian L. Simpson, Theodore E. Walker, Paul C. Drake
  • Patent number: 4824939
    Abstract: A novel leaching process for separating extractable material from a particulate solid material that comprises extractable and non-extractable portions includes the steps of introducing the particulate solid material and a liquid solvent to an extraction zone; agitating the liquid solvent to a degree sufficient to suspend the particulate solid material and effect segregation of particles thereof in relation to their propensity to settle; maintaining contact between the liquid solvent and the particulate solid material for a time sufficient to leach extractable material therefrom; and selectively withdrawing particles of the solid material from the extraction zone. In a preferred embodiment, the leaching process is a multi-stage process in which the selectively withdrawn particles from each stage are introduced to the next successive stage of the series.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: April 25, 1989
    Assignee: Eastman Kodak Company
    Inventor: Brian L. Simpson