Granted Patent
Utility
US 6,823,899 · App. 10/392,628
Insulated pipe arrangement and method for its production
Inventors:
Jürg P. Weibel, Valentin Galliker, Urs Flück
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Mar 20, 2003
Inventors
Jürg P. Weibel
Valentin Galliker
Urs Flück
Assignee (at issue)
ARMACELL ENTERPRISE 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.