Opinion ID: 4445789
Heading Depth: 3
Heading Rank: 1

Heading: A topical formulation comprising:

Text: diclofenac sodium present at 2% w/w; DMSO present at about 40 to about 50% w/w; ethanol present at 23–29% w/w; propylene glycol present at 10–12% w/w; hydroxypropyl cellulose; and water to make 100% w/w, wherein the formulation has a viscosity of 500– 5000 centipoise. In the district court the only challenge to validity of claim 12 was on the ground of obviousness. Actavis stipulated to infringement. I flag the usage “comprising” in claim 1 above, for this is the identical composition for which “consisting essentially of” is today held to invalidate the composition claims on the ground of indefiniteness. 4 HZNP MEDICINES LLC v. ACTAVIS LABORATORIES UT, INC.