http://www.freshpatents.com/Concentrating-evaporators-dtnewntc159.php USPTO Class 159 - Concentrating evaporators en-us Tue, 2 Dec 2008 00:06:16 -0800 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/Industrial-evaporation-apparatus-dt20081127ptan20080289773.php Tue, 2 Dec 2008 00:06:16 -0800 It is an object of the present invention, in the case of an apparatus in which a liquid containing material having a lower boiling point than that of the liquid is made to flow down along an external surface of a guide, during which time the lower boiling point material...