Trademarks can be renewed indefinately, copyrights have a limit depending on the medium that is usually about enough to cover the lifetime of the person who registered the copyright.
After 20 years your patent is public domain, unrenewable. I wasn't aware of any exceptions, and it's weird that pharmaceuticals would be.. guess I didn't do enough reading.
After 20 years your patent is public domain, unrenewable. I wasn't aware of any exceptions, and it's weird that pharmaceuticals would be.. guess I didn't do enough reading.