Patents by Inventor Dirk Schenk

Dirk Schenk 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).

  • Permeation cell for in vitro determination of skin permeation of pharmaceutical drugs
    Patent number: 6521191
    Abstract: A permeation cell for the in vitro determination of the permeation of pharmaceutical active ingredients through the skin, having a donor chamber (34) and an acceptor chamber (4) that is separable therefrom, a window lying between them for receiving sealingly a skin membrane and sealingly closable filling and emptying openings at both chambers, characterized in that the acceptor chamber (4) is in the form of a cylindrical vessel that is upright during operation, having a closure (8; 50; 80) at its upper end and a side window opening (6) in the region near its base, and the donor chamber (34) is in the form of a connection piece that joins onto the acceptor chamber radially and can be closed at its outer end, with the exception of its closure (8; 50; 80) the acceptor chamber (4) is inserted removably into a housing (10) that fits closely around it, which housing has, in the region of the window opening (6) of the acceptor chamber, a corresponding slightly wider opening (30), and the connection piece forming the
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: February 18, 2003
    Assignee: Novosis AG
    Inventors: Dirk Schenk, German Gassner
  • Permeation cell for invitro determination of skin permeation of pharmaceutical drugs
    Patent number: 6294134
    Abstract: A permeation cell for the in vitro determination of the permeation of pharmaceutical active ingredients through the skin, having a donor chamber (34) and an acceptor chamber (4) that is separable therefrom, a window lying between them for receiving sealingly a skin membrane wherein the acceptor chamber (4) is in the form of a cylindrical vessel that is upright during operation, having a closure (8; 50) at its upper end and a side window opening (6) in the region near its base, and the donor chamber (34) is in the form of a connection piece that joins onto the acceptor chamber radially and can be closed at its outer end. The acceptor chamber (4) is inserted removably into a housing (10), which housing has, in the region of the window opening (6) of the acceptor chamber, a corresponding slightly wider opening (30), and the connection piece forming the donor chamber (34) is screwed removably onto the housing concentrically with the window opening (6).
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: September 25, 2001
    Assignee: Novosis Pharma AG
    Inventors: Dirk Schenk, German Gassner
  • Process for the production of new mutants of herpes simplex virus type 1 and type 2
    Patent number: 4322404
    Abstract: Herpes virus was doubly mutated in two steps by treatment with phosphono formic acid and 5-ethyl-2'-desoxyuredine. In this way the pathogenicity of the herpes virus was so weakened that they are usable as vaccines.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: March 30, 1982
    Inventors: Kailash K. Gauri, Klaus Pressler, Klaus-Dirk Schenk