Patent ID: 7651867
Filing Date: 2010-01-26
Classification: B01L,Y10T

Abstract:
1. A method of making a two chamber test device comprised of a container having an opening at the top and divided into a lower chamber and an upper chamber by a porous barrier fixed between said upper and lower chambers, the method including: sealingly affixing the perimeter of the porous barrier to the inside of said container at an intermediate level in said container; loading a volume of test liquid into said upper chamber of said container sufficient to completely fill said lower chamber while leaving a volume of liquid in said upper chamber; applying a vacuum to said upper chamber to draw out air in said lower chamber through said porous barrier and said liquid in said upper chamber so as to substantially completely evacuate said lower chamber; thereafter applying pressure to said liquid in said upper chamber to force liquid in said upper chamber into said evacuated lower chamber to substantially completely fill the same with said test liquid, also disposed in said upper chamber.