Patents by Inventor Timothy T. Revak

Timothy T. Revak 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).

  • Prion inactivation in connective tissue materials
    Patent number: 5756678
    Abstract: It has been discovered that it is possible to treat solutions of connective tissue material for the inactivation of prions in a manner such that connective tissue molecules are not adversely affected by the inactivation treatment. For example, solubilized atelopeptide collagen can be treated with sodium hydroxide for the inactivation of prions and other infectious agents without affecting the ability of the solubilized collagen to form stable fibers.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: May 26, 1998
    Assignee: Cohesion Technologies, Inc.
    Inventors: Vivek N. Shenoy, Timothy T. Revak
  • Method of controlling structure stability of collagen fibers produced form solutions or dispersions treated with sodium hydroxide for infectious agent deactivation
    Patent number: 5616689
    Abstract: In accordance with the present invention, stabilized dispersions of collagen fibers that have been treated in order to inactivate infectious agents and methods of stabilizing such collagen fibers are provided.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: April 1, 1997
    Assignee: Collagen Corporation
    Inventors: Vivek N. Shenoy, Timothy T. Revak, George H. Chu, Hugh R. McMullin, Joel S. Rosenblatt, George R. Martin
  • High temperature battery cell comprising stress-free hollow fiber bundle
    Patent number: 4510681
    Abstract: Thermal stressing of hollow fibers constituting the electrolyte-separator in a high temperature battery cell, and of certain other elements thereof, is avoided by suspending the assembly comprising the anolyte tank, the tubesheet, the hollow fibers and a cathodic current collector-distributor within the casing and employing a limp connection between the collector-distributor and the cathode terminal of the cell.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: April 16, 1985
    Assignee: The Dow Chemical Company
    Inventors: Joginder N. Anand, Timothy T. Revak, Frank J. Rossini
  • Membrane system for intermittent gas separation
    Patent number: 4421529
    Abstract: An improved process for separating gases using a hollow fiber membrane on an intermittent basis is described. It has been found that if the pressure on the feed side of the membrane is maintained essentially constant or is allowed to vary slowly during operation and in the periods between operating cycles the useful lifetime of the separation device is greatly extended. This process is particularly useful for the separation of air into oxygen- and nitrogen-enriched streams using hollow fibers melt spun from poly(4-methylpentene-1).
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: December 20, 1983
    Assignee: The Dow Chemical Company
    Inventors: Timothy T. Revak, Robert T. Krueger
  • High temperature battery cell comprising stress-free hollow fiber bundle
    Patent number: 4332868
    Abstract: Thermal stressing of hollow fibers constituting the electrolyte-separator in a high temperature battery cell, and of certain other elements thereof, is avoided by suspending the assembly comprising the anolyte tank, the tubesheet, the hollow fibers and a cathodic current collector-distributing means, within the casing and employing a limp connection between the latter means and the cathode terminal of the cell.
    Type: Grant
    Filed: September 1, 1978
    Date of Patent: June 1, 1982
    Assignee: The Dow Chemical Company
    Inventors: Joginder N. Anand, Timothy T. Revak, Frank J. Rossini
  • Method of fabricating helium-tight tubesheet for hollow fiber type battery cells
    Patent number: 4296052
    Abstract: A ceramic tubesheet pierced by a plurality of hollow, glass fibers and consisting of sintered particles is rendered essentially impermeable by selectively fusing the portion of the tubesheet subjacent to and defining one of its surfaces. The fiber lengths extending from the opposite surface of the tubesheet are freer to flex and less likely to be broken than if the entire tubesheet were fused.
    Type: Grant
    Filed: February 14, 1980
    Date of Patent: October 20, 1981
    Assignee: The Dow Chemical Company
    Inventors: Joginder N. Anand, Timothy T. Revak, Floris Y. Tsang
  • Helium-tight tubesheet for hollow fiber type battery cells and method of fabricating the same
    Patent number: 4219613
    Abstract: A ceramic tubesheet pierced by a plurality of hollow, glass fibers and consisting of sintered particles is rendered essentially impermeable by selectively fusing the portion of the tubesheet subjacent to and defining one of its surfaces. The fiber lengths extending from the opposite surface of the tubesheet are freer to flex and less likely to be broken than if the entire tubesheet were fused.
    Type: Grant
    Filed: February 16, 1979
    Date of Patent: August 26, 1980
    Assignee: The Dow Chemical Company
    Inventors: Joginder N. Anand, Timothy T. Revak, Floris Y. Tsang