Granted Patent
Utility
US 4,812,151 · App. 07/179,358
Viscosity control in the manufacture of mineral fibers
Inventors:
Isac M. Sheinkop, Eugene C. Varrasso
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Apr 8, 1988
Inventors
Isac M. Sheinkop
Eugene C. Varrasso
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.