Granted Patent
Utility
US 4,371,670 · App. 06/238,297
Copolymers having a backbone of alternating polymer blocks and silicon units
Inventor:
Le-Khac Bi
Patented Case
View Patent ↗
Granted: Feb 1, 1983
Filed: Feb 26, 1981
Inventor
Le-Khac Bi
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.