Measuring and testing – Gas content of a liquid or a solid – Of a liquid
Reexamination Certificate
2004-10-01
2008-10-14
Larkin, Daniel S (Department: 2856)
Measuring and testing
Gas content of a liquid or a solid
Of a liquid
C073S019050, C073S863230, C096S006000
Reexamination Certificate
active
07434446
ABSTRACT:
A gas separation system for extraction of gas from pressurized fluid has a gas sampling interface and gas circulation tubing to pass sampled gas to a gas sensor to determine the character or a property of the gas. The gas sampling interface includes a semi-permeable membrane in the form of tubing having an inner core volume with an internal support that provides multiple supporting surfaces to prevent collapse of the tubing wall against external pressure and provides interstitial spaces for the flow of gas. Internal supports may include a coil of spring-like configuration fitted coaxially within the tubing; or multiple filaments that form a longitudinal bundle within the core of the tubing, or both. An outer tubular conduit surrounding the semi-permeable membrane tubing provides a flow path for the external fluid to increase the rate of diffusion of dissolved gases through the semi-permeable membrane.
REFERENCES:
patent: 3834546 (1974-09-01), Brun et al.
patent: 4702102 (1987-10-01), Hammerton
patent: 5121627 (1992-06-01), D'Aoust
patent: 5655529 (1997-08-01), Pontzer
Johnson Bruce
McNeil Craig
Larkin Daniel S
Miltons LLP
Pro-Oceanus Sytems, Inc.
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