Chemistry: analytical and immunological testing – Process or composition for determination of physical state... – Leak detection
Reexamination Certificate
2008-12-05
2011-12-27
Bullock, In Suk (Department: 1772)
Chemistry: analytical and immunological testing
Process or composition for determination of physical state...
Leak detection
C436S149000, C436S164000, C422S068100, C422S082050, C422S082060, C422S082070, C422S082080, C422S082090, C422S082110, C422S083000, C422S119000, C435S283100, C435S287100, C435S287700, C435S287800, C435S287900, C435S288700, C156S306600, C174S047000, C204S428000, C210S178000, C210S198100, C210S636000, C210S639000, C210S650000, C210S652000, C210S739000, C210S741000, C210S085000, C210S090000, C235S385000, C235S491000, C250S302000, C250S343000, C285S093000, C310S328000, C324S663000, C324S698000, C340S010200, C340S
Reexamination Certificate
active
08084259
ABSTRACT:
The present invention describes a system for accurately measuring the concentration of a substance within a filter housing. A concentration sensor and a communications device are coupled so as to measure and transmit the concentration of a particular substance within the filter housing while in use. This system allows the operator to certify the integrity of the filters within the filter housing at the customer site without additional equipment. In one embodiment, a tracer gas, such as helium or hydrogen, is added to a carrier and injected into the system. The concentration of tracer gas at a specific operating transmembrane pressure is indicative of bubble pointing specific pores in the filter. This test will give a more sensitive indication of the bubble point and the presence of defects than a standard diffusion test. In a second embodiment, two gasses, in a known ratio, are introduced into the filter housing.
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Bullock In Suk
Millipore Corporation
Nields, Lemack & Frame, LLC
White Dennis M
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