Granted Patent
Utility
US 5,985,146 · App. 08/899,182
Sanitary rigid shell spiral wound element
Inventors:
Peter Knappe, Daniel F. Quigg, Ronald Magnani
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Jul 23, 1997
Inventors
Peter Knappe
Daniel F. Quigg
Ronald Magnani
Assignee (at issue)
TriSept 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.