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http://www.google.com.au/patents/US1740584?utm_source=gb-gplus-share
Patent US1740584 - REFINING OF HYDROCARBON OILS
REFINING OF HYDROCARBON OILS
EGBERT HENRY GARDNER et al
Overview
Abstract
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Description
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Patent number
: 1740584
Filing date
: 13 Jul 1926
Issue date
: 24 Dec 1929
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