EL SEGUNDO, Calif., March 12, 2013 (GLOBE NEWSWIRE) -- Cereplast, Inc. (OTCQB:CERP) (the “Company”), a leading manufacturer of proprietary biobased, compostable and sustainable bioplastics, today announced that the United States Patent and Trademark Office (USPTO) has granted the Company patent protection for biodegradable nanopolymer compositions and biodegradable articles made thereof. USPTO-issued patent 8,389,614 is a significant patent for the company and for the field of biodegradable polymers, as it is the first of its kind. This patent expands Cereplast’s growing intellectual property portfolio and protects the composition formulation invented by the Cereplast R&D team.