Granted Patent
Utility
US 5,141,639 · App. 07/732,966
Vacuum filter assembly
Inventors:
Menahem Kraus, Jacob Yonath, Dan Vitkuske
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Jul 19, 1991
Inventors
Menahem Kraus
Jacob Yonath
Dan Vitkuske
Assignee (at issue)
Gelman Sciences
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.