Granted Patent
Utility
US 4,592,770 · App. 06/620,885
Glass melter
Inventors:
William O. Pearman, Joseph L. Hunt, William P. Cunningham
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Jun 15, 1984
Inventors
William O. Pearman
Joseph L. Hunt
William P. Cunningham
Assignee (at issue)
GAF 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.