Granted Patent
Utility
US 5,283,080 · App. 07/912,365
Method and apparatus for manufacturing a granule-covered roofing material by modifying a process parameter in response to measured reflected light
Inventors:
Glenn D. Lamb, David Rodenbaugh, Lawrence J. Grubka
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Jul 10, 1992
Inventors
Glenn D. Lamb
David Rodenbaugh
Lawrence J. Grubka
Assignee (at issue)
Owens-Corning Fiberglas Technology, 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.