APPARATUS AND METHOD FOR DELIVERING BENEFICIAL LIQUIDS AT STEADY RATE

WIPO Patent Application WO/2010/025412

A3

An apparatus (1) for delivering a beneficial agent (2) is disclosed in one embodiment of the invention as including a water collection chamber. A water-transporting membrane (5) is provided to communicate with the water collection chamber (8). An extraction chamber receives water (9) through the water-transporting membrane (5), expanding the extraction chamber. A dispensing chamber, containing a beneficial agent (2), is configured to contract upon expanding the extraction chamber. This causes the dispensing chamber to expel the beneficial agent (2) through a subterranean delivery channel, such as a rigid hollow spike. In certain embodiments, a rate adjustment mechanism (6a, 6b) may control the rate that water (9) is received through the water-transporting membrane (5), thereby controlling the rate the beneficial agent (2) is expelled. The water-transporting membrane (5) has features that repel osmagent from passing through to the water collection chamber (8). The apparatus (1) features steady rate performance without refreshing the water chamber (8) and low temperature sensitivity.

GORDON JOHN (US)
JOSHI ASHOK (US)
WOLD TRUMAN (US)
BHAVARAJU SAI (US)

PCT/US2009/055432

June 10, 2010

August 28, 2009

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MICROLIN LLC (US)
GORDON JOHN (US)
JOSHI ASHOK (US)
WOLD TRUMAN (US)
BHAVARAJU SAI (US)

B01D61/00; B01D63/00

US20050269266A1	2005-12-08
KR19990072093A	1999-09-27
KR100700227B1	2007-03-26
US6217773B1	2001-04-17
KR20100023920A	2010-03-04

FONDA, David (Salt Lake City, UT, US)

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