Patents by Inventor Roy H. Hamerstedt

Roy H. Hamerstedt 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).

  • Method of permanent removal from cell suspension in a porous container
    Patent number: 6124088
    Abstract: A process and apparatus in which cryoprotectant in cryopreserved samples is removed with the use of turbulence and convective-dispersion around the cells within the primary cryopreservation container. Convective-dispersion is applied via the combined action of gravity and pulsatile transmembrane flow of buffer through the pores of containers fabricated from appropriate membrane material such as that disclosed in U.S. Pat. No. 5,026,342 and U.S. Pat. No. 5,261,870, as incorporated herein by reference above. By using mechanical forces to aid the process of cryoprotectant removal, the benefits of slow cryoprotectant removal are retained while the actual removal time is markedly decreased.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: September 26, 2000
    Assignee: BioPore, Inc.
    Inventors: Rupert P. Amann, Roy H. Hamerstedt