Facts

Plaintiff Dupont Air Products Nanomaterials LLC (DA) was a joint venture between DuPont and AirProducts, and manufactured colloidal silica sols and particles for semiconductor and wafer polishing. DA filed suit against defendant Cabot Microelectrics for a declaratory judgment of invalidity and non-infringement following Cabot's warnings to DA regarding infringement of Cabot's patents. Cabot filed a counter-claim for patent infringement. Three of the patents concerned silica based tungsten chemical mechanical polishing slurries, while a fourth involved alumina based slurries.

PLAINTIFF/COUNTER-DEFENDANT'S CONTENTIONS:
Plaintiff claimed that no infringement occurred.

DEFENDANT/COUNTER-CLAIMANT'S CONTENTIONS:
Defendant/counter-claimant claimed that Plaintiff willfully infringed on its patents.

Result

The jury found in favor of plaintiff, finding that the plaintiff did not infringe on Cabot's patents.