Granted Patent
Utility
US 5,624,965 · App. 08/243,649
Arylenedialkylidene polymers for high performance ion exchange membranes
Inventors:
Jian-Ping Huang, Frederick P. Chlanda
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Apr 26, 1994
Inventors
Jian-Ping Huang
Frederick P. Chlanda
Assignee (at issue)
The Graver 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.