Granted Patent
Utility
US 6,199,778 · App. 08/746,046
Systems and processes for recycling glass fiber waste material into glass fiber product
Inventor:
Curtis L. Hanvey, Jr.
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Nov 6, 1996
Inventor
Curtis L. Hanvey, Jr.
Assignee (at issue)
PPG Industries Ohio, 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.