Granted Patent
Utility
US 6,241,199 · App. 09/260,788
Protective insulating sleeve for plumbing installations
Inventor:
Joseph P. Ismert
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Mar 2, 1999
Inventor
Joseph P. Ismert
Assignee (at issue)
Sioux Chief Mfg. Co., 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.