Patents Represented by Attorney, Agent or Law Firm H. Samuel Frost
  • Method of applying and removing a protective film to the surface of a handrail for an escalator or moving walkway
    Patent number: 6450228
    Abstract: A film and a method of applying the film to a handrail of an escalator or moving walkway are provided. The film can be a single or double layered film. Printed matter, e.g. advertising, can be applied to or between the films. An apparatus and related method for applying the film are also included and rely on the motion of the handrail to unroll a supply of the film, with one or more rollers pressing the film onto the handrail.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: September 17, 2002
    Assignee: Ronald H. Hall
    Inventors: John McLeod, Ronald L. Bugg
  • Method of reclaiming waste oil
    Patent number: 6440298
    Abstract: An apparatus and a method are provided reclaiming a useful oil product from waste oil, such as used lubricating oil. The apparatus comprises an oil feed means, a boiler, a heater and a separating means. The heater is used to heat the waste oil in the boiler to a temperature such that lighter hydrocarbons remain unvolatilized, trapping contaminants therewith. The separating means separates the volatilized lighter hydrocarbons from the unvolatilized heavier hydrocarbons and contaminants.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: August 27, 2002
    Assignee: Patent Holdings Ltd.
    Inventor: Edward Carlton Shurtleff
  • Water recovery, primarily in the cathode side, of a proton exchange membrane fuel cell
    Patent number: 6436563
    Abstract: A fuel cell or fuel cell stack has a proton exchange membrane or other electrolyte, and appropriate inlets and outlets for cathode and anode sides of the fuel cell. Dryers are connected to the cathode inlet and cathode outlet in such a manner as to enable one dryer to recover moisture from an exhausted oxidant stream while the other dryer is humidifying an incoming stream. Optionally, a dryer arrangement can be provided for recovering moisture on the anode or fuel side of the fuel cell.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: August 20, 2002
    Assignee: Hydrogenics Corporation
    Inventors: David Frank, Xuesong Chen