Granted Patent
Utility
US 4,063,003 · App. 05/504,704
Product and process for producing fire retardant cellulosic materials
Inventor:
Seymour Hartman
Patented Case
View Patent ↗
Granted: Dec 13, 1977
Filed: Sep 10, 1974
Inventor
Seymour Hartman
Assignee (at issue)
Champion International Corporation Limited
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.