Patents by Inventor Gertrud Goetz

Gertrud Goetz 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).

  • Sulfonated polyimide gas separation membranes
    Patent number: 5964925
    Abstract: Gas separation membranes are prepared from sulfonated polyimides exhibiting desirable gas separation characteristics, combined with good film-forming properties and desirable solubility characteristics.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: October 12, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: Yurdagul F. Ozcayir, Gertrud Goetz, Benjamin Bikson
  • Sulfonated polyimide gas separation membranes
    Patent number: 5725633
    Abstract: Novel polyimide gas separation membranes and the process of using such membranes to separate gases are disclosed. The polyimides are formed from rigid aromatic dianhydrides and aromatic diamines that contain sulfonic acid, salified sulfonic acid, or sulfonic ester groups. Methods of preparing improved composite gas separation membranes from the sulfonated polyimides of this invention are disclosed.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: March 10, 1998
    Assignee: Praxair Technology, Inc.
    Inventors: Yurdagul F. Ozcayir, Gertrud Goetz, Benjamin Bikson
  • Sulfonated polyimide gas separation membranes
    Patent number: 5618334
    Abstract: Gas separation membranes are prepared from sulfonated polyimides exhibiting desirable gas separation characteristics, combined with good film-forming properties and desirable solubility characteristics.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: April 8, 1997
    Assignee: Praxair Technology, Inc.
    Inventors: Yurdagul F. Ozcayir, Gertrud Goetz, Benjamin Bikson