What it is: A market failure occurs when the supply of a good or service is insufficient to meet demand. This results in an inefficient distribution of resources among market participants. Under free market conditions, prices are determined almost exclusively by the forces of supply and demand.
NuvaRing is currently under the protection of a patent that prevents any generic NuvaRing from being manufactured in the United States. The first patent for NuvaRing currently expires in April 2018.This is the earliest possible date that a generic version of NuvaRing could become available. However, there are other circumstances that could come up to extend the exclusivity period of NuvaRing beyond 2018.This could include such things as other patents for specific NuvaRing uses or lawsuits.uvaRing is currently under the protection of a patent that prevents any generic NuvaRing from being manufactured in the United States. The first patent for NuvaRing currently expires in April 2018.
Crestor will have its earliest patent expire on July 2, 2012, and the last one on August 4, 2020. Rosuvastatin (generic Crestor) has been approved for sale by Health Canada, and has already been stocked by some pharmacies as of April 2012 â prior to the official Crestor expiry.restor will have its earliest patent expire on July 2, 2012, and the last one on August 4, 2020. Rosuvastatin (generic Crestor) has been approved for sale by Health Canada, and has already been stocked by some pharmacies as of April 2012 â prior to the official Crestor expiry.