Patents by Inventor John Christiansen

John Christiansen 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: 5911877
    Abstract: A device for maintaining effective bacterial levels within a collecting container of an organic matter collection system of the type having a collecting container having a bottom and a liquid to air interface-surface is provided. The bacterial incubator has an enclosure defining an interior, the enclosure adapted to be positioned beneath said liquid to air interface-surface. The enclosure has a plurality of apertures therethrough, the apertures sized to allow the flow of wastewater into the interior of the enclosure. Placed in the interior is a packing having a high surface area. The apertures in the enclosure are sized to retain the packing in the interior. The packing is adapted to allow wastewater to flow therethrough.
    Type: Grant
    Filed: February 27, 1996
    Date of Patent: June 15, 1999
    Assignee: Interbio, Inc.
    Inventors: J. Peter Perez, John A. Christiansen
  • Patent number: 5516687
    Abstract: A device and method for maintaining effective bacterial levels within a collecting container of an organic matter collection system of the type having a collecting container having a bottom and a liquid to air interface-surface is provided. The bacterial incubator comprise: a housing having a first and second interior chamber; an elongated feed tube, connected to the housing, having a passageway terminating at one end in connection with the second interior chamber and terminating at the other end in a feed opening; and a plurality of high surface-area members that are contained within the first interior chamber. The first interior chamber is in fluid connection with both the second interior chamber and the exterior of the housing. The elongated feed tube is of a length sufficient to allow a section thereof containing the feed opening to be positioned above the air to liquid interface-surface of a collecting container.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: May 14, 1996
    Assignee: Interbio, Inc.
    Inventors: J. Peter Perez, John A. Christiansen
  • Patent number: 5219089
    Abstract: A non-corrugated box cardboard construction. The box has exterior panels, top and bottom flaps, and interior pads. An interior panel lies interior to and immediately adjacent each exterior panel, whereby the interior panels reinforce and support the exterior panels. The exterior panels, interior panels and flaps are joined by continuity to each other, having been cut from a single sheet. The fold lines between the interior panels include perforation lines along the fold lines.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: June 15, 1993
    Assignee: Chapco Carton Company
    Inventors: Charles G. Kiolbasa, John Christiansen
  • Patent number: 4537080
    Abstract: Hydraulically actuated grips are constructed to permit loading of specimens from either side of the grips. The grips are particularly adapted for use with flat specimens, are easily actuated, and are symmetrically designed so that when actuated, the grips do not exert any substantial axial load on the specimen and a uniform clamping force is applied laterally across the specimen. In addition, the grips, which can be used for either tensile or compressive loading, do not exert any bending moment on the specimen during test loading.
    Type: Grant
    Filed: March 1, 1984
    Date of Patent: August 27, 1985
    Assignee: MTS Systems Corporation
    Inventor: John A. Christiansen
  • Patent number: 4483955
    Abstract: Polyethylene terephthalate resin compositions are provided containing fillers; reinforcing agents; or blends of such fillers and agents; alkali metal silicates, carbonates, or bicarbonates; and neopentylglycol dibenzoate.Articles molded from these compositions have high gloss surfaces and heat deflection temperatures when molded at temperatures below 110.degree. C. even without a precompounding drying stage.Surprisingly, the inclusion of neopentylglycol dibenzoate allows the concentration of alkali metal silicate, carbonate, or bicarbonate to be substantially reduced while retaining the high gloss surfaces seen when alkali metal silicates, carbonates, or bicarbonates are used alone at much higher concentrations.
    Type: Grant
    Filed: February 3, 1982
    Date of Patent: November 20, 1984
    Assignee: Celanese Corporation
    Inventors: John Christiansen, Shau-Zou Lu
  • Patent number: 4425457
    Abstract: Polyethylene terephthalate resin compositions are provided containing fillers; reinforcing agents; or blends of such fillers and agents and selected alkali metal salts having anions which are oxides of Group IV of the periodic table preferably carbonates and bicarbonates.Articles molded from these compositions have high gloss surfaces and heat deflection temperatures when molded at temperatures below 110.degree. C. even without a precompounding drying stage.
    Type: Grant
    Filed: September 28, 1981
    Date of Patent: January 10, 1984
    Assignee: Celanese Corporation
    Inventors: John Christiansen, Shau-zou Lu
  • Patent number: D290014
    Type: Grant
    Filed: March 1, 1984
    Date of Patent: May 26, 1987
    Assignee: MTS Systems Corporation
    Inventor: John A. Christiansen