Granted Patent
Utility
US 4,647,619 · App. 06/798,049
Impact modified polybutylene terephthalate resin molding compositions
Inventor:
Barry D. Dean
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Nov 14, 1985
Inventor
Barry D. Dean
Assignee (at issue)
Atlantic Richfield 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.