Granted Patent
Utility
US 6,329,493 · App. 09/411,921
Plumbing articles from poly(aryl ether sulfones)
Inventors:
Mohammad Jamal El-Hibri, Barry L. Dickinson
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Oct 4, 1999
Inventors
Mohammad Jamal El-Hibri
Barry L. Dickinson
Assignee (at issue)
BP Corporation North America 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.