Granted Patent
Utility
US 4,434,071 · App. 06/339,571
1,3-Dibromo dialkylhydantoin and olefin oligomer reaction product as a catalyst for preparing alkenyl dicarboxylic acid anhydride
Inventor:
Justin C. Powell
Patented Case
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Granted: Feb 28, 1984
Filed: Jan 15, 1982
Inventor
Justin C. Powell
Assignee (at issue)
Texaco 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.