Granted Patent
Utility
US 6,258,884 · App. 08/035,832
Polymeric acetals resistant to mineral deposition
Inventor:
Bruce M. Mulholland
Patented Case
View Patent ↗
Granted: Jul 10, 2001
Filed: Mar 23, 1993
Inventor
Bruce M. Mulholland
Assignee (at issue)
Hoechst Celanese Corporation
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.