National Research Development Corporation

Marion E McNeill

Neil B Graham

Ernst R Huehns

David A Wood

A temperature- and/or polar fluid-sensitive device which comprises a mechanically strained semi-crystalline hydrophilic polymer.

Polyethylene oxide temperature - or fluid-sensitive shape memory device

A device for the sustained release of active substance comprises a wall defining a cavity for the reception of active substance, the wall being of impermeable material and having one or more ports therethrough. Sections of hydrogel material are within the cavity, the hydrogel, in use, being swollen to cover the ports in the cavity wall. Active ingredient is released from the container only through the hydrogel covering the ports. In this way sustained and controlled release of the active substance from the device is obtained.

Device for sustained release of active substance

A controlled release device which comprises:

Growing community of inventors

Milngavie, United Kingdom

Marion E McNeill