Granted Patent
Utility
US 5,879,800 · App. 08/835,262
Low -shrinkage hybrid yarns production thereof and use thereof
Inventor:
Josef Geirhos
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Apr 8, 1997
Inventor
Josef Geirhos
Assignee (at issue)
Hoechst Trevira GmbH & Co. KG
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.