Granted Patent
Utility
US 6,524,513 · App. 09/157,836
Process for forming a membrane filtration apparatus
Inventors:
Steven R. Pearl, Wayne S. Merrill, Cristopher Petersen
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Sep 21, 1998
Inventors
Steven R. Pearl
Wayne S. Merrill
Cristopher Petersen
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.