Controlled porosity osmotic pump

Details Controlled porosity osmotic pump Controlled porosity osmotic pump

1987-07-15

1990-11-06

Griffin, Ronald W.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Tablets, lozenges, or pills

6048901, 6048921, 424473, A61K 964

Patent

active

049685074

ABSTRACT:
The instant invention is directed to an osmotic pump comprising:
(A) at least one active agent surrounded by
(B) a rate controlling water insoluble wall, having a fluid permeability of 6.96.times.10.sup.-18 to 6.96.times.10.sup.-14 cm.sup.3 sec/g and a reflection coefficient of less than 1, prepared from:

REFERENCES:
patent: 3538214 (1970-11-01), Polli et al.
patent: 3845770 (1974-11-01), Theeuwes et al.
patent: 3916899 (1975-11-01), Theeuwes et al.
patent: 4160452 (1979-07-01), Theeuwes
patent: 4200098 (1980-04-01), Ayer et al.
patent: 4256108 (1981-03-01), Theeuwes
patent: 4285987 (1981-08-01), Ayer et al.
patent: 4557925 (1985-12-01), Lindahl et al.
patent: 4687660 (1987-08-01), Baker et al.
patent: 4851228 (1989-07-01), Zentner et al.

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