Granted Patent
Utility
US 4,131,637 · App. 05/780,578
Grafted polymeric material and process for preparing
Inventors:
Philip A. Bernstein, James P. Coffey, Alan E. Varker
Patented Case
View Patent ↗
Granted: Dec 26, 1978
Filed: Mar 23, 1977
Inventors
Philip A. Bernstein
James P. Coffey
Alan E. Varker
Assignee (at issue)
ESB Incorporated
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.