Granted Patent
Utility
US 4,644,052 · App. 06/765,636
Reaction of bis-oxazoline with polycarboxylic acid catalyzed by alkali or alkaline earth metal cationic complex
Inventors:
Anil B. Goel, Teresa A. DeLong
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Aug 15, 1985
Inventors
Anil B. Goel
Teresa A. DeLong
Assignee (at issue)
Ashland Oil, Inc.
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.