Sigma-Aldrich can't sell in the US:
Nanosys Reaches Settlement of Patent Infringement Lawsuite Against Nanoco Technologies for Quantum Dot Technology
July 23rd, 2009
Palo Alto, CA. July 23, 2009 – Nanosys, Inc. today announced it has agreed to settlement terms of a patent infringement lawsuit against Nanoco Technologies Ltd. The lawsuit claimed that the United Kingdom firm’s quantum dot technology infringes upon five seminal quantum dot patents held by Nanosys. In the settlement, Nanoco agreed to terminate its current U.S. business for its core-shell quantum dots. Those quantum dots were sold in the US by its U.S. distributor, Sigma-Aldrich under the name Lumidots. In the settlement, Nanoco did not admit that the asserted patents are either infringed or valid Additional terms of the settlement were not disclosed.