One of the most controversial topics of the treaty proposed by the United States concerns patents and copyright. Critics say that if the measures proposed by the United States were implemented and implemented, this would reduce scientific research in Latin America. On the website of the Council of Left Canadians, Barlow wrote: „This agreement establishes applicable global rules for patents, copyrights and trademarks. It has gone far beyond its original scope of the protection of inventions or cultural products of origin and now allows the practice of patenting plants and forms of animals as well as seeds. It promotes the private rights of companies vis-à-vis local communities, their genetic heritage and their traditional medicines.  After a six-year suspension, negotiations have resumed and are under way at the EU-LAK summit in Madrid in May 2010. The aim is to negotiate a comprehensive trade agreement that includes not only trade in industrial and agricultural products, but also services, improved procurement rules, intellectual property, customs and trade facilitation, and technical barriers to trade. Europeans would be disappointed by the possibility of a „grace period“ for certain products with regard to the reduction of import duties. Argentina insists on this concept, which would only allow certain products to be put on the market in 15 years. While Brazil, Paraguay and Uruguay have already included 87% of the products in an EU offer, Argentina says it will not open more than 82% of its market. Mercosur and the EU are trying to revive the negotiations, which have been held back since 2003.
 In early 2014, Argentina, Brazil, Uruguay and Paraguay tried to prevent the negotiation of a timetable for opening markets with the European Union (EU) under the free trade agreement with Mercosur. Technicians from the two blocs who met in Brussels in March 2014 did not agree because of the lack of ambition of Mercosur`s proposal, reports the Brazilian newspaper Folha de S.Paulo. Brazil and Argentina disagreed and the Brazilian representative reportedly mentioned the existence of a Plan B, which would consist of different rhythms for the opening of markets in each country. The United States has a trade surplus with Argentina and is Argentina`s third largest trading partner for goods and services (behind Brazil and China).