Patents by Inventor Peter Spragg

Peter Spragg 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).

  • Simulation program for centrifugation using a fixed-angle rotor
    Patent number: 5762598
    Abstract: A fixed-angle rotor, having a centrifuge tube inclined at a predetermined gradient angle with respect to a rotational axis, is used to obtain a sedimentation coefficient of sample particles. In one method, a distance in the centrifugal direction is corrected by the gradient angle .theta. of centrifuge tube 1. Sedimentation coefficient S.sub.20,W is calculated based on the corrected distance, and then the sedimentation coefficient S.sub.20,W is multiplied with sin(.theta.) to obtain a corrected sedimentation coefficient. In another method, a distance in the centrifugal direction is corrected by the gradient angle .theta., and also an angular acceleration .omega..sup.2 is corrected by dividing it by sin(.theta.). And then, the sedimentation coefficient S.sub.20,W is calculated based on thus corrected distance and corrected angular acceleration.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: June 9, 1998
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Peter Spragg, David Rickwood, Steven Humphries, Mitsutoshi Yotsuyanagi, Kazuyoshi Tokunaga