04755469 is referenced by 25 patents and cites 8 patents.

A method for tagging an oil so that subsequently it may be identified as to source by incorporating into the oil as a tracer material an oil-soluble or oil-dispersible Group VIB, Group VIIB or lanthanum series rare earth metal salt of a fatty acid. The so-tagged oil may be utilized in any desired manner. Thereafter, an oil suspected to contain at least a portion of the so-tagged oil is analyzed for the presence of the added metal moiety. The method is especially useful in tracing a complex oleaginous and petroliferous material so that it may be recovered and identified following a theft or spill or to trace the flow of such oil injected through a subterranean reservoir.

Title
Oil tracing method
Application Number
6/423698
Publication Number
4755469
Application Date
September 27, 1982
Publication Date
July 5, 1988
Inventor
Ronald J Lukasiewicz
Irvine
CA, US
Elihu Goldish
Lakewood
CA, US
William E Showalter
Seal Beach
CA, US
Agent
D Sandford
G Wirzbicki
Howard Lambert
Assignee
Union Oil Company of California
CA, US
IPC
G01N 33/28
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