Planting – Liquid or gas soil treatment – Hand manipulated
Reexamination Certificate
2009-08-28
2011-11-22
Novosad, Christopher J. (Department: 3641)
Planting
Liquid or gas soil treatment
Hand manipulated
Reexamination Certificate
active
08061280
ABSTRACT:
An apparatus for delivering a beneficial agent is disclosed in one embodiment of the invention as including a water collection chamber. A water-transporting membrane is provided to communicate with the water collection chamber. An extraction chamber receives water through the water-transporting membrane, expanding the extraction chamber. A dispensing chamber, containing a beneficial agent, is configured to contract upon expanding the extraction chamber. This causes the dispensing chamber to expel the beneficial agent through a subterranean delivery channel, such as a rigid hollow spike. In certain embodiments, a rate adjustment mechanism may control the rate that water is received through the water-transporting membrane, thereby controlling the rate the beneficial agent is expelled. The water-transporting membrane has features that repel osmagent from passing through to the water collection chamber. The apparatus features steady rate performance without refreshing the water chamber and low temperature sensitivity.
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Bhavaraju Sai
Gordon John Howard
Joshi Ashok V.
Wold Truman
Fonda David
Microlin LLC
Novosad Christopher J.
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