Granted Patent
Utility
US 4,988,376 · App. 07/388,372
Glassification of lead and silica solid waste
Inventors:
Glenn Mason, Gerald Gardner
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Aug 2, 1989
Inventors
Glenn Mason
Gerald Gardner
Assignee (at issue)
Western Research Institute, 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.