Granted Patent
Utility
US 6,648,167 · App. 09/782,870
Ducting passages for a polymeric lining
Inventors:
John M. Brupbacher, Scott Vogt
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Feb 14, 2001
Inventors
John M. Brupbacher
Scott Vogt
Assignee (at issue)
Sermatech International, Inc.
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.