Patents by Inventor Rudolf Heidemann

Rudolf Heidemann 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).

  • Process and apparatus for combined milling and drying
    Patent number: 6880772
    Abstract: A process of both milling and drying a solvent-moist material (e.g., water-moist methylhydroxyethylcellulose) is described. The process includes, (a) providing a mill-dryer (100) which includes, in series, a heat exchanger (1), a mill (2) and a particulate separating apparatus (105) connected by conduits (8), (9) and (11, 12), which together define a mill-dryer circuit (103). The mill-dryer (100) also includes a bypass conduit (14), which provides optionally at least partial gaseous bypass of the heat exchanger (1). The process further includes: (b) introducing the solvent-moist material into the mill (2); (c) circulating a vapor stream (e.g.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: April 19, 2005
    Assignee: Wolff Walsrode AG
    Inventors: Hartwig Schlesiger, Martin Morning, Gerd Sonnenberg, Rudolf Heidemann
  • Process and apparatus for combined milling and drying
    Publication number: 20030122003
    Abstract: A process of both milling and drying a solvent-moist material (e.g., water-moist methylhydroxyethylcellulose) is described. The process includes, (a) providing a mill-dryer (100) which includes, in series, a heat exchanger (1), a mill (2) and a particulate separating apparatus (105) connected by conduits (8), (9) and (11, 12), which together define a mill-dryer circuit (103). The mill-dryer (100) also includes a bypass conduit (14), which provides optionally at least partial gaseous bypass of the heat exchanger (1). The process further includes: (b) introducing the solvent-moist material into the mill (2); (c) circulating a vapor stream (e.g.
    Type: Application
    Filed: October 22, 2002
    Publication date: July 3, 2003
    Inventors: Hartwig Schlesiger, Martin Morning, Gerd Sonnenberg, Rudolf Heidemann