Use of asymmetric membranes in delivery devices

Details Use of asymmetric membranes in delivery devices Use of asymmetric membranes in delivery devices

A - Human Necessities

61

K

167/153, 167/327

A61K 9/22 (2006.01) A61K 9/00 (2006.01) A61K 9/28 (2006.01) A61K 9/36 (2006.01) A61K 9/48 (2006.01) A61K 9/50 (2006.01) A61K 9/52 (2006.01)

Patent

CA 1338552

A device for controlled release of an active substance through one or more asymmetric membranes by diffusion and/or osmotic pumping. The active substance may typically be a pharmaceutically active substance such as antihypertensive and antianxiety agent to be released into the fluid of the gastro- intestinal tract of an animal over a prolonged period of time. The asymmetric membranes may be permeable and made of for example a cellulose ester or ethyl cellulose. The active substance may be released by osmotic pumping or by diffusion. Also disclosed is a process for producing the device by a phase inversion process. The asymmetric membrane is comprised of two membrane layers, one being a relatively thick and very porous substructure and the other being a very dense thin skin.

609559

Affiliated with

Also associated with

Rating

Use of asymmetric membranes in delivery devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Use of asymmetric membranes in delivery devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of asymmetric membranes in delivery devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1235495