Methods and devices for controlled release

Details Methods and devices for controlled release Methods and devices for controlled release

1986-12-18

1990-12-25

Thexton, Matthew A.

Fluid sprinkling, spraying, and diffusing

Processes

Involving slow diffusion

239 55, 424 84, A61L 904, A01N12502

Patent

active

049796739

ABSTRACT:
A device is disclosed which achieves a constant rate of release of an active ingredient in the temperature range of 5.degree. to 45.degree. C., which comprises a container having at least a portion of its surface membrane consisting essentially of polyethylene, polypropylene, or copolymers thereof, said membrane having a thickness of less than 6 mil, and within the container a solution of active ingredient in a solvent in contact with a negative release modulator, wherein the negative release modulator is less miscible with the solution at 5.degree. C. than at 45.degree. C.

REFERENCES:
patent: 3852419 (1974-12-01), Roelofs et al.
patent: 3951622 (1976-04-01), Wilk
patent: 3961628 (1976-06-01), Arnold
patent: 4160335 (1979-07-01), Von Kohorn et al.
patent: 4237113 (1980-12-01), Cardarelli
patent: 4320873 (1982-03-01), Martens, III et al.
patent: 4325941 (1982-04-01), Dal Moro et al.
patent: 4387849 (1983-06-01), Van Loveren et al.
patent: 4406883 (1983-09-01), Byrne et al.
patent: 4608048 (1986-08-01), Cortese et al.

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