Patents by Inventor Birgitta Meier

Birgitta Meier 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).

  • Manufacture of polymer fibrids
    Patent number: 5695695
    Abstract: The invention enables production of polymer fibrids comprising a polyester which is injected as a low-viscosity jet into a shear field formed by liquid jets, torn apart by the liquid jets and formed into fibrids having a fibril length of from 0.1 to 5 mm by cooling, crystallization and orientation.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: December 9, 1997
    Assignee: Messer Griesheim Gmbh
    Inventors: Peter Steinau, Dieter Jungert, Volker Mai, Birgitta Meier, Eckehard Pohl
  • Process and apparatus using liquefied gas for making plastic particles
    Patent number: 5582779
    Abstract: The invention relates to a process for the solvent-free and dry production of particles from plastics. According to the invention, the plastic is heated to form a viscous material, in this form, is conveyed as material stream through an outlet into a comminution device and there, with spraying of a pressurized liquid atomization medium against it, is comminuted into fibrids and/or fine particles.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: December 10, 1996
    Assignee: Messer Griesheim GmbH
    Inventors: Gerhard Gross, Birgitta Meier, Johannes Vetter, Peter Steinau