Gas-selective permeable membrane and method of manufacturing...

Gas separation: apparatus – Apparatus for selective diffusion of gases

Reexamination Certificate

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C095S045000, C095S053000, C427S527000, C073S04050A

Reexamination Certificate

active

07141096

ABSTRACT:
A gas-selective permeable membrane (1) utilisable in a leak detector for a gas, more particularly helium, comprising a sheet-like body (11) on which at least one reduced thickness area (15) is defined by removing a material from the sheet-like body. This at least one reduced thickness area (15) being permeable to at least one gas and formed so as that it is partly surrounded by a thicker and substantially gas-impermeable area (16) ensuring the structural strength of the membrane.

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patent: 3505180 (1970-04-01), Brogden
patent: 5882496 (1999-03-01), Northrup et al.
patent: 6152995 (2000-11-01), Edlund
patent: 6277177 (2001-08-01), Bley et al.
patent: 6541676 (2003-04-01), Franz et al.
patent: 101 22 733 (2002-11-01), None
patent: 0352 371 (1996-03-01), None
patent: 8-73201 (1996-03-01), None

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