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http://www.google.com.au/patents/US3691211?utm_source=gb-gplus-share
Patent US3691211 - PROCESS FOR PREPARING STEROLS FROM TALL OIL PITCH
PROCESS FOR PREPARING STEROLS FROM TALL OIL PITCH
Donald V. Julian et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3691211
Filing date
: 7 Dec 1970
Issue date
: 1972
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