Patent 7736712 was granted and assigned to Consort Medical on June, 2010 by the United States Patent and Trademark Office.
A seal for a valve for use in a pharmaceutical dispensing device, which seal is formed from an elastomeric composition comprising:(a) an isobutylene polymer or co-polymer thereof;(b) a cross-linking agent for the isobutylene polymer or co-polymer thereof; and(c)) an accelerator for the cross-linking agent, wherein the accelerator includes a polysulphide compound derived from a substituted dithiocarbonic acid or derivative thereof.