Granted Patent
Utility
US 4,129,410 · App. 05/825,403
Method of drying gypsum wallboard and apparatus therefor
Inventors:
Chester R. Nowick, Alfred DE Franza
Patented Case
View Patent ↗
Granted: Dec 12, 1978
Filed: Aug 17, 1977
Inventors
Chester R. Nowick
Alfred DE Franza
Assignee (at issue)
National Gypsum Company
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.