Granted Patent
Utility
US 4,312,641 · App. 06/042,397
Heat-reactivatable adsorbent gas fractionator and process
Inventors:
Marcel G. Verrando, Donald H. White, Jr.
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: May 25, 1979
Inventors
Marcel G. Verrando
Donald H. White, Jr.
Assignee (at issue)
Pall 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.