Alza, Cygnus Therapeutics Systems news

The U.S. District Court in San Francisco dismissed CYGN's suit challenging the validity of AZA's U.S. Patent No. 4,588,580 covering fentanyl transdermal patches. Fentanyl is an analgesic for post-operative pain and chronic pain.

The court found that AZA had failed to make a "sufficiently explicit threat" to enforce its patent against CYGN. The court said it was premature to rule on the validity of the patent, said CYGN, which intends to appeal. ...