Granted Patent
Utility
US 4,430,472 · App. 06/450,692
Elastomeric compositions with improved chemical, water and heat resistance
Inventor:
Raymond L. Guzy
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Dec 17, 1982
Inventor
Raymond L. Guzy
Assignee (at issue)
Hughes Tool Company LLC
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.