Patents by Inventor Richard M. Lueptow

Richard M. Lueptow 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).

  • Publication number: 20180339871
    Abstract: Layering of initially mixed granular dissimilar material components deposited by surface flow is realized by varying the relative angle of the flowing layer periodically with respect to the bulk of the pile formed. Layer thickness and extent can be controlled by varying the timing and extent of the surface variations. Variation in surface flow rates may be realized by varying the feed rate from an inlet to a collection base at a fixed feed location, varying the feed location relative to the collection base, tilting the collection base that is supporting the material, and reducing the pile repose angle using vibration or fluid flow through the base.
    Type: Application
    Filed: May 21, 2018
    Publication date: November 29, 2018
    Inventors: Paul B. Umbanhowar, Richard M. Lueptow, Yi Fan
  • Patent number: 9078942
    Abstract: The present invention provides titanium dioxide/single-walled carbon nanotube composites (TiO2/SWCNTs), articles of manufacture, and methods of making and using such composites. In certain embodiments, the present invention provides membrane filters and ceramic articles that are coated with TiO2/SWCNT composite material. In other embodiments, the present invention provides methods of using TiO2/SWCNT composite material to purify a sample, such as a water or air sample.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: July 14, 2015
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Yuan Yao, Gonghu Li, Kimberly Gray, Richard M Lueptow
  • Publication number: 20090175757
    Abstract: The present invention provides titanium dioxide/single-walled carbon nanotube composites (TiO2/SWCNTs), articles of manufacture, and methods of making and using such composites. In certain embodiments, the present invention provides membrane filters and ceramic articles that are coated with TiO2/SWCNT composite material. In other embodiments, the present invention provides methods of using TiO2/SWCNT composite material to purify a sample, such as a water or air sample.
    Type: Application
    Filed: May 14, 2008
    Publication date: July 9, 2009
    Applicant: Northwestern University
    Inventors: Yuan Yao, Gonghu Li, Kimberly Gray, Richard M. Lueptow
  • Publication number: 20030146157
    Abstract: Reverse osmosis filtration is conducted using a rotatable inner body having an axis of rotation and a reverse osmosis filter member disposed on the inner body. An outer body is disposed about the inner body and spaced therefrom to provide an annulus between an annular outer surface of the filter member and an annular inner surface of the outer body to receive a liquid to be filtered. A source of the liquid under pressure is communicated to an inlet to the annulus. The inner body is rotated at a rotational speed effective to generate Taylor or other vortices in the liquid in the annulus.
    Type: Application
    Filed: February 1, 2002
    Publication date: August 7, 2003
    Inventor: Richard M. Lueptow
  • Patent number: 5537854
    Abstract: A gaseous fuel analyzer having a flow through chamber equipped with sound producing means at one end and sound receiving means at the other for measuring an acoustic property of fuel flowing through the chamber and for numerically relating the acoustic property to the combustion character of the fuel.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: July 23, 1996
    Inventors: Scott Phillips, Richard M. Lueptow
  • Patent number: 4946434
    Abstract: A disposable manifold and valve for fluid processing are claimed in which a manifold provides a plurality of sterile paths for directing the flow of fluids. A rotatable valve employs a cam to control the flow of fluids through the manifold. The valve and manifold system are suited for the processing of blood and particularly for the washing of shed blood retrieved during surgery.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: August 7, 1990
    Assignee: Haemonetics Corporation
    Inventors: Richard Plaisted, Richard M. Lueptow
  • Patent number: 4482342
    Abstract: A cell washing method and apparatus which utilizes centrifugation to separate blood components in a flexible bag. The less dense separated components e.g., supernatant, is expressed from the bag by centrifugal force acting on a plate adjacent the bag and the more dense component e.g., RBC's, remains. The bag is oriented at a double angle in the centrifuge so that less dense component accumulates at one location and more dense at a second location diagonally opposite the first location, thus facilitating removal of the less dense and washing of the more dense component.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: November 13, 1984
    Assignee: Haemonetics Corporation
    Inventors: Richard M. Lueptow, Jeffrey J. Peterson
  • Patent number: 4480751
    Abstract: A sealable body of flexible material having a body 10 with frangible seams 20 in the body joined at an apex 22. A closure seam 24 transversely intersects the apex 22. The closure seam may be ruptured at the apex and the body torn along the frangible seams to separate it from its contents.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: November 6, 1984
    Assignee: Haemonetics Corporation
    Inventor: Richard M. Lueptow
  • Patent number: 4425114
    Abstract: A blood donation unit in which a phlebotomy needle is coupled on one conduit to a source of anticoagulant contained in a flexible bag and on another conduit to a flexible collection bag. The anticoagulant bag and collection bag are placed in a chamber within which a vacuum is created, preferably by a hand pump operated by the donor. A rigid plate is disposed between the two bags. The blood flow from the donor is maintained at an adaquate flow level by the donor's pumping which provides a pressure differential between the bags and the needle. The whole blood is mixed with anticoagulant immediately after passing through the phlebotomy needle. The ratio of whole blood to anticoagulant is independent of the volume of whole blood collected and is fixed by the ratio of the surface areas of opposing bag surfaces at the interface with the plate.
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: January 10, 1984
    Assignee: Haemonetics Corporation
    Inventors: Donald W. Schoendorfer, Richard M. Lueptow, Jonathan D. Schiff