This document provides an overview and analysis of key developments related to the biopolymer polyethylene furanoate (PEF). It summarizes that PEF is a recyclable, bio-based alternative to polyethylene terephthalate (PET) that has superior barrier and mechanical properties. The document analyzes patent filing trends for PEF from 2005-2015, finding increasing filings from 2007-2012 with most applications originating from WO, US, and CN. Procter & Gamble and Canon are identified as top assignees. International patent classifications for PEF focus on macromolecular compounds and multilayer structures.