Patents Assigned to Portland State University
  • Programmable analog array circuit
    Patent number: 5959871
    Abstract: There is disclosed a programmable analog or mixed analog/digital circuit. More particularly, this invention provides a circuit architecture that is flexible for a programmable electronic hardware device or for an analog circuit whose input and output signals are analog or multi-valued in nature, and primarily continuous in time. There is further disclosed a design for a current-mode integrator and sample-and-hold circuit, based upon Miller effect.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: September 28, 1999
    Assignee: Analogix/Portland State University
    Inventors: Edmund Pierzchala, Marek A. Perkowski
  • Mask for disguising or counteracting odors
    Patent number: 5891508
    Abstract: Masks are produced which disguise or counteract strong odors that would ordinarily make the environment unpleasant. Masks are treated with a fixate carrier and at least one odor-masking or counteracting agent in a volatile solvent. In a preferred embodiment, both the inner and outer mask surfaces are essentially a continuous, homogeneous layer.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: April 6, 1999
    Assignee: Portland State University
    Inventor: Dennis Barnum
  • Electrolytic codeposition of metals and nonmetallic particles
    Patent number: 4666568
    Abstract: A method of electrolytically codepositing a composite of a metal and nonmetallic insoluble particles on the cathode of an electroplating cell a magnetic field used to produce movement and suspension of the particles in an electrolyte containing the metal in ionic form.
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: May 19, 1987
    Assignee: State of Oregon acting by and through the State Board of Higher Education on behalf of Portland State University
    Inventor: John Dash
  • Chromium-iron alloy plating from a solution containing both hexavalent and trivalent chromium
    Patent number: 4615773
    Abstract: Electrodeposition of a chromium-iron alloy on a substrate using an electrolyte solution prepared from water, an inorganic hexavalent chromium compound, an inorganic trivalent chromium compound, and an inorganic iron compound, the solution having an adjusted pH lying within the range of 0.5 to 2.0.
    Type: Grant
    Filed: February 7, 1986
    Date of Patent: October 7, 1986
    Assignee: State of Oregon Acting By and Through the State Board of Higher Education on Behalf of Portland State University
    Inventors: John Dash, Arash S. Kasaaian
  • Use of alcohol for increasing the current efficiency of chromium plating
    Patent number: 4447299
    Abstract: Plating bath solution usable in the electrodeposition of chromium on a cathode which includes methyl and/or ethyl alcohol.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: May 8, 1984
    Assignee: State of Oregon Acting by and Through the State Board of Higher Education on behalf of Portland State University
    Inventors: Arash S. Kasaaian, John Dash