Patents by Inventor Shirin W. Hasan

Shirin W. Hasan 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).

  • Cell washing device and method
    Patent number: 6197579
    Abstract: Disclosed is a cell washing device and method of washing cells that utilizes the device. The device is particularly designed for sterile transfer of cells from a primary centrifuge tube and for maintaining the cells in a sterile environment during subsequent washing steps. The device is configured to provide for decantation of a supernatant by inversion without appreciable loss of a selected population of lower density cells from the pellet during the washing procedure.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: March 6, 2001
    Assignee: Dendreon Corporation
    Inventors: Peter Van Vlasselaer, Shirin W. Hasan
  • Process for making silanized colloidal silica
    Patent number: 6015843
    Abstract: A method of preparing an aqueous suspension of organosilanized colloidal silica particles is disclosed. Such particles are used in a variety of applications including density gradient separation media, anti-abrasion coatings and toner materials. The disclosed process is environmentally safe and produces a product that is aqueous and non-toxic to most biological cells.
    Type: Grant
    Filed: January 14, 1998
    Date of Patent: January 18, 2000
    Assignee: Dendreon Corporation
    Inventors: Peter Van Vlasselaer, Shirin W. Hasan