Granted Patent
Utility
US 6,283,205 · App. 09/488,068
Polymeric centralizer
Inventor:
James H. Cannon
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Jan 19, 2000
Inventor
James H. Cannon
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.