Granted Patent
Utility
US 5,176,087 · App. 07/809,012
Apparatus and method for low temperature thermal stripping of volatile organic compounds from soil and waste materials with non-oxidative cross-sweep gases
Inventors:
John W. Noland, Luis Alberto Velazquez, Michael Cosmos
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Dec 17, 1991
Inventors
John W. Noland
Luis Alberto Velazquez
Michael Cosmos
Assignee (at issue)
Roy F. Weston, Inc.
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.