BioPak Technology, Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5767222 Degradable polydioxaneone-based materialsExpiredSep 29, 93Jun 16, 98[C08G, C07D]
5420304 Method to produce cyclic estersExpiredSep 29, 93May 30, 95[C07D]
5332839 Catalytic production of lactide directly from lactic acidExpiredSep 18, 90Jul 26, 94[C07D]
5274127 Lactide production from dehydration of aqueous lactic acid feedExpiredSep 18, 90Dec 28, 93[C07D]
5216050 Blends of polyactic acidExpiredSep 06, 90Jun 01, 93[C08L]

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