Details for Patent: 4,968,507
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Summary for Patent: 4,968,507
Title: | Controlled porosity osmotic pump |
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: (i) a polymer permeable to water but impermeable to solute and (ii) 0.1 to 60% by weight, based on the total weight of (i) and (ii), of at least one pH insensitive pore forming additive dispersed throughout said wall. |
Inventor(s): | Zentner; Gaylen M. (Lawrence, KS), Rork; Gerald S. (Lawrence, KS), Himmelstein; Kenneth J. (Irvine, CA) |
Assignee: | Merck & Co., Inc. (Rahway, NJ) |
Application Number: | 07/073,781 |
Patent Claim Types: see list of patent claims | Delivery; Device; | More… ↓ |
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