Granted Patent
Utility
US 5,276,239 · App. 07/919,455
Dimerization of long-chain olefins using a silica gel alkylsulfonic acid
Patented Case
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Granted: Jan 4, 1994
Filed: Jul 27, 1992
Assignee (at issue)
Texaco Chemical 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.