Granted Patent
Utility
US 6,406,906 · App. 09/568,774
Gelatin membrane filters and method for producing the same
Inventors:
Helmar Herbig, Helmut Jaschhof, Khuong To Vinh
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: May 10, 2000
Inventors
Helmar Herbig
Helmut Jaschhof
Khuong To Vinh
Assignee (at issue)
Sartorius AG
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.