Patents by Inventor Derek J. Hei

Derek J. Hei 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: 20160354533
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix. The matrix containing the particles is contained in a housing, and the particles range in diameter from about 100 ?m to about 1500 ?m. The device can be used to adsorb and remove a pathogen-inactivating compounds from a biological composition such as a blood product.
    Type: Application
    Filed: January 8, 2016
    Publication date: December 8, 2016
    Applicant: Cerus Corporation
    Inventor: Derek J. HEI
  • Patent number: 9259525
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix. The matrix containing the particles is contained in a housing, and the particles range in diameter from about 100 ?m to about 1500 ?m. The device can be used to adsorb and remove a pathogen-inactivating compounds from a biological composition such as a blood product.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: February 16, 2016
    Assignee: Cerus Corporation
    Inventor: Derek J. Hei
  • Publication number: 20100133160
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix. The matrix containing the particles is contained in a housing, and the particles range in diameter from about 100 ?m to about 1500 ?m. The device can be used to adsorb and remove a pathogen-inactivating compounds from a biological composition such as a blood product.
    Type: Application
    Filed: September 21, 2009
    Publication date: June 3, 2010
    Inventor: Derek J. HEI
  • Patent number: 7611831
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix. The matrix containing the particles is contained in a housing, and the particles range in diameter from about 100 ?m to about 1500 ?m. The device can be used to adsorb and remove a pathogen-inactivating compounds from a biological composition such as a blood product.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: November 3, 2009
    Assignee: Cerus Corporation
    Inventor: Derek J. Hei
  • Patent number: 7425304
    Abstract: Apparatus, systems and methods are disclosed for treating a biological fluid with light. A container of biological fluid is introduced into a fluid treatment chamber where it is contacted with light provided by one or more light sources in proximity to the fluid treatment chamber. A drawer for holding containers of biological fluid introduces the containers into the chamber. Containers for holding the biological fluid are marked by the apparatus to indicate the status of the treatment.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: September 16, 2008
    Assignees: Fenwal, Inc., Cerus Corporation
    Inventors: Serge de Gheldere, Mahmood Mohiuddin, Peyton S. Metzel, George D. Cimino, Derek J. Hei, Michael S. Clarke
  • Patent number: 7105093
    Abstract: Apparatus, systems and methods are disclosed for treating a biological fluid with light. A container of biological fluid is introduced into a fluid treatment chamber where it is contacted with light provided by one or more light sources in proximity to the fluid treatment chamber. A drawer for holding containers of biological fluid introduces the containers into the chamber. Containers for holding the biological fluid are marked by the apparatus to indicate the status of the treatment.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: September 12, 2006
    Assignees: Baxter International Inc., Cerus Corporation
    Inventors: Serge de Gheldere, Mahmood Mohiuddin, Peyton S. Metzel, George D. Cimino, Derek J. Hei, Michael S. Clarke
  • Patent number: 7037642
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: May 2, 2006
    Assignee: Cerus Corporation
    Inventor: Derek J. Hei
  • Patent number: 7025877
    Abstract: Apparatus, systems and methods are disclosed for treating a biological fluid with light. A container of biological fluid is introduced into a fluid treatment chamber where it is contacted with light provided by one or more light sources in proximity to the fluid treatment chamber. A drawer for holding containers of biological fluid introduces the containers into the chamber. Containers for holding the biological fluid are marked by the apparatus to indicate the status of the treatment.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: April 11, 2006
    Assignees: Baxter International Inc., Cerus Corporation
    Inventors: Serge de Gheldere, Mahmood Mohiuddin, Peyton S. Metzel, George D. Cimino, Derek J. Hei, Michael S. Clarke
  • Patent number: 6951713
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition, while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix. The matrix containing the particles is contained in a housing, and the particles range in diameter from about 1 ?m to about 200 ?m. The matrix can be fibrous, and the particles can have a surface area greater than 750 m2/g and a pore diameter between about 25 and 800 ?. The device can be used to adsorb and remove a pathogen-inactivating compound that is a nucleic acid-binding compound such as psoralen, an acridine derivative or a dye from a biological composition such as a blood product.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: October 4, 2005
    Assignee: Cerus Corporation
    Inventors: Derek J. Hei, Michael S. Clarke
  • Publication number: 20040185553
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix.
    Type: Application
    Filed: December 7, 2001
    Publication date: September 23, 2004
    Inventor: Derek J. Hei
  • Publication number: 20040185544
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix.
    Type: Application
    Filed: October 5, 2001
    Publication date: September 23, 2004
    Inventor: Derek J. Hei
  • Publication number: 20030146162
    Abstract: Apparatus, systems and methods are disclosed for treating a biological fluid with light. A disposable fluid processing set including integrally connected containers and tubing and a holder or organizer for receiving at least some of the containers and tubing are disclosed.
    Type: Application
    Filed: October 11, 2002
    Publication date: August 7, 2003
    Inventors: Peyton S. Metzel, Daniel F. Bischof, Joseph S. Moore, Yuanpang Samuel Ding, Robert E. Herman, Veronique Mayaudon, Gregory Soudant, Daniel Lecour, Yvon Briere, George D. Cimino, Derek J. Hei, James Laird, Mahmood Mohiuddin
  • Publication number: 20030085173
    Abstract: Apparatus, systems and methods are disclosed for treating a biological fluid with light. A container of biological fluid is introduced into a fluid treatment chamber where it is contacted with light provided by one or more light sources in proximity to the fluid treatment chamber. A drawer for holding containers of biological fluid introduces the containers into the chamber. Containers for holding the biological fluid are marked by the apparatus to indicate the status of the treatment.
    Type: Application
    Filed: October 8, 2002
    Publication date: May 8, 2003
    Inventors: Serge deGheldere, Mahmood Mohiuddin, Peyton S. Metzel, George D. Cimino, Derek J. Hei, Michael S. Clarke
  • Patent number: 6544727
    Abstract: Methods and devices for the removal of psoralens and psoralen photoproducts from blood products are described. The methods include contacting a psoralen- and irradiation-treated blood product with a resin capable of adsorbing psoralens and psoralen photoproducts. The removal process is particularly suitable for use with platelet concentrates and plasma because the process does not have a significant adverse effect on clotting factor function. The methods and devices can be incorporated with apheresis systems and other devices and procedures currently used to process blood products for transfusion.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: April 8, 2003
    Assignee: Cerus Corporation
    Inventor: Derek J. Hei
  • Publication number: 20020192632
    Abstract: Method of treating product which contains a nucleic acid-containing pathogen to be inactivated. One such method involves forming a mixture comprising a blood product, free psoralen, and low molecular weight products, and contacting the mixture with a hypercrosslinked resin to remove at least substantially all of the free psoralen and the low molecular weight psoralen photoproducts. A hypercrosslinked resin in this method preferably eliminates a wetting step that a number of other types of resins require before being used to absorb the pathogen inactivating compound.
    Type: Application
    Filed: January 16, 2002
    Publication date: December 19, 2002
    Inventors: Derek J. Hei, George D. Cimino
  • Publication number: 20020115585
    Abstract: Method for removing a pathogen-inactivating compound such as psoralen from a biological fluid such as blood or a blood product. One such method involves treating a blood product which contains a nucleic acid-containing pathogen to be inactivated. This method includes adding a pathogen-inactivating compound such as psoralen to the blood product; irradiating the psoralen and the blood product to form a mixture comprising the blood product, free psoralen, and low molecular weight psoralen photoproducts; and contacting the mixture with a hypercrosslinked resin to remove at least substantially all of the free psoralen and the low molecular weight psoralen photoproducts. A hypercrosslinked resin in this method preferably eliminates a wetting step that a number of other types of resins require before being used to adsorb the pathogen inactivating compound.
    Type: Application
    Filed: June 1, 2001
    Publication date: August 22, 2002
    Inventor: Derek J. Hei
  • Publication number: 20020094568
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix.
    Type: Application
    Filed: December 7, 2001
    Publication date: July 18, 2002
    Inventor: Derek J. Hei
  • Publication number: 20020045228
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix.
    Type: Application
    Filed: October 5, 2001
    Publication date: April 18, 2002
    Inventor: Derek J. Hei
  • Patent number: 6364864
    Abstract: Containers and methods for making containers are disclosed. The containers include a chamber and a pouch fixed within the chamber. During manufacture, the open edges of the pouch are sealed between the walls of the container by a seal defining, in part, the peripheral edge of the chamber.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: April 2, 2002
    Assignee: Baxter International Inc.
    Inventors: Mahmood Mohiuddin, George D. Cimino, Derek J. Hei
  • Patent number: 6331387
    Abstract: Methods and devices are provided for reducing the concentration of low molecular weight compounds in a biological composition containing cells while substantially maintaining a desired biological activity of the biological composition. The device comprises highly porous adsorbent particles, and the adsorbent particles are immobilized by an inert matrix. The matrix containing the particles is contained in a housing, and the particles range in diameter from about 100 &mgr;m to about 1500 &mgr;m. The device can be used to adsorb and remove pathogen-inactivating compounds from a biological composition such as a blood product.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: December 18, 2001
    Assignee: Cerus Corporation
    Inventor: Derek J. Hei