Organic vapor sorbent protective device with thin-film...

Details Organic vapor sorbent protective device with thin-film... Organic vapor sorbent protective device with thin-film...

2006-09-11

2011-11-29

Bullock, In Suk (Department: 1772)

Chemistry: electrical current producing apparatus, product, and

Deferred action type

Responsive to addition of liquid

C422S068100, C422S082050, C422S083000, C422S087000, C422S088000, C422S200000

Reexamination Certificate

active

08067110

ABSTRACT:
A sorbent media protective device includes an enclosure having a gas inlet, gas outlet and a thin-film multilayer indicator. The thin-film multilayer indicator is proximate sorbent media that can sorb a vapor of interest flowing from the gas inlet towards the gas outlet. The indicator includes a porous detection layer whose optical thickness changes in the presence of the vapor, located between a semireflective layer and a reflective layer permeable to the vapor. With equilibration at the applied vapor concentration between at least a portion of the media and the vapor, the vapor can pass through the reflective layer into the detection layer and change the detection layer optical thickness sufficiently to cause a visibly discernible change in the indicator appearance if viewed through the semireflective layer.

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