Granted Patent
Utility
US 4,384,162 · App. 06/396,255
Removing boron trifluoride contaminant from organic liquids with polyvinyl alcohol
Inventors:
Roger F. Vogel, Ajay Madhav Madgavkar, Harold E. Swift
Patented Case
View Patent ↗
Granted: May 17, 1983
Filed: Jul 8, 1982
Inventors
Roger F. Vogel
Ajay Madhav Madgavkar
Harold E. Swift
Assignee (at issue)
Gulf Research & Development Company
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.