Granted Patent
Utility
US 4,002,689 · App. 05/572,071
Modified, fire retardant polytetramethylene ether glycol
Inventor:
Hideo Tomomatsu
Patented Case
View Patent ↗
Granted: Jan 11, 1977
Filed: Apr 28, 1975
Inventor
Hideo Tomomatsu
Assignee (at issue)
The Quaker Oats 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.