Granted Patent
Utility
US 6,552,133 · App. 09/871,378
Method for making carboxy-functionalized polyphenylene ethers, and blends containing them
Inventors:
Gary William Yeager, Yiqun Pan
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: May 31, 2001
Inventors
Gary William Yeager
Yiqun Pan
Assignee (at issue)
General Electric 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.