Granted Patent
Utility
US 6,044,666 · App. 09/076,281
Insulating flow and bushing blocks, bushing assemblies, fiber forming apparatus and method for forming fibers
Inventors:
Gerard J. Burger, Dennis S. Postupack, Robert A. Roach, James W. Koewing
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: May 12, 1998
Inventors
Gerard J. Burger
Dennis S. Postupack
Robert A. Roach
James W. Koewing
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.