Patents Represented by Attorney, Agent or Law Firm David A. Crichton
  • Method and device for densifying pulverized material
    Patent number: 6688345
    Abstract: Method and device for densifying pulverized material, which is transported by means of a feeding screw in a screw housing, wherein alternatively vacuum and compressed air is applied via a filter on the inner circumference of the screw housing.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: February 10, 2004
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Joan Iglesias, Josep Arisa