Patents by Inventor Robert W. Rightnour

Robert W. Rightnour 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: 4810471
    Abstract: A vacuum manifold for solid phase extraction of a plurality of liquid samples from reagent tubes removably connected by valves to a vacuum chamber through a removable vacuum tight cover closing. A plurality of parallel flow paths are provided through the cover for the flow of liquid samples into the vacuum chamber, through a plurality of valves rotatable about an axis parallel to the general direction of flow through the cover to provide flow adjustment and closing of the valves. A valve is also provided for attaching the vacuum chamber to a vacuum source to create a vacuum therein. An optional attachment is provided permitting treatment of materials with nitrogen or other gases using a manifold plate attached to a source of gas and providing a plurality of valve control means axially aligned to couple with the rotatable valves for passage of liquid into the vacuum chamber.
    Type: Grant
    Filed: July 24, 1986
    Date of Patent: March 7, 1989
    Assignee: Rohm and Haas Co.
    Inventors: George D. Wachob, Robert W. Rightnour
  • Patent number: D289861
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: May 19, 1987
    Assignee: Supelco, Inc.
    Inventors: George D. Wachob, Robert W. Rightnour
  • Patent number: D317810
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: June 25, 1991
    Inventor: Robert W. Rightnour