Luís Eduardo Castanheira Costa, Thaís de Oliveira Costa, Ana Lúcia Ponte Freitas


Hydrogels are formed by three-dimensional polymer networks that retain water and can be used for various applications, especially the biomedical area. Agar, a polysaccharide extracted from seaweed and already used industrially, is among the natural polymers capable of forming hydrogels. The aim of this study was to conduct a survey to evaluate the patent deposits of these products in the World Intellectual Property Organization (WIPO) database and the European Patent Office (Espacenet). It was noted that the oldest patent is from 1972 and there was a large increase in the number of deposits in the period from 2008 to 2018. The country with the largest number of patents is the Republic of Korea and the majority of documents are classified as preparations for medical, dental or hygienic purposes.


Polysaccharide; Gel; Patents

Texto completo:



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