Collagen Corp. said that it received a notice of allowance for aU.S. patent application covering purified collagen conjugated topolyethylene glycol, a water soluble polymer.

The material could be safer and more effective than existinginjectable products used to repair skin and other soft tissue,the Palo Alto, Calif., company said. The patented technologyalso covers collagen matrices for localized delivery ofbiologically active agents, Collagen said.

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