Granted Patent
Utility
US 6,126,829 · App. 08/702,715
Biofilm carrier for water and waste water purification
Inventors:
Lars Ake Hans Gunnarsson, Asa Malmqvist, Thomas Welander, Anders Erik Lofquist
Patented Case
View Patent ↗
Granted: Oct 3, 2000
Filed: Feb 25, 1997
Inventors
Lars Ake Hans Gunnarsson
Asa Malmqvist
Thomas Welander
Anders Erik Lofquist
Assignee (at issue)
Kaldnes Miljoteknologi AS
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.