Granted Patent
Utility
US 4,445,696 · App. 06/468,339
Nonbursting magnetic liquid seals for high vacuum applications
Inventors:
Kuldip Raj, Ronald Moskowitz, Raymond Rodier
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Feb 22, 1983
Inventors
Kuldip Raj
Ronald Moskowitz
Raymond Rodier
Assignee (at issue)
Ferrofluidics 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.