Granted Patent
Utility
US 4,554,770 · App. 06/569,998
Horizontal sliding window with removable fixed sash
Inventor:
Dennis F. Anders
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Jan 11, 1984
Inventor
Dennis F. Anders
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.