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US 3,953,498 AGranted
Diesters and diacids of phenanthrene
AssigneeGulf Research & Development Company
InventorRobert J. Hartle
Life of this patent
Estimating the term…
Abstract
Novel 1,8-, 2,7-, 3,6- and 2,5-diesters and diacids of phenanthrene.
Claims9
A phenanthrene diester selected from the group consisting of 1,8-, 2,7-, 3,6- and 2,5-phenanthrene diesters, said diester having the formula:
- ##SPC3##
- wherein R has from one to 12 carbon atoms and is selected from the group consisting of alkyl, alkoxyalkyl, cycloalkyl and aralkyl.
A phenanthrenedicarboxylic acid selected from the group consisting of 1,8-, 2,7-, 3,6- and 2,5-phenanthrenedicarboxylic acids.
Dependencies are inferred from the claim text.