sentences:  The FTC recommended only one evergreening injunction against a potential generic market entrant be permitted per product, and an expedited process of resolving such claims.The process of evergreening may involve specific aspects of patent law and international trade law.Linkage evergreening is the process whereby pharmaceutical safety, quality and efficacy regulators are required to 'link' their normal evaluation with an assessment of whether an impending generic product may infringe an existing patent.