	US 11,806,447 B2
	Compositions and devices of poly-4-hydroxybutyrate
David P. Martin, Arlington, MA (US); Simon F. Williams, Cambridge, MA (US); and Kai Guo, Belmont, MA (US)
Assigned to Tepha, Inc., Lexington, MA (US)
Filed by Tepha, Inc., Lexington, MA (US)
Filed on Jan. 22, 2019, as Appl. No. 16/254,085.
Application 16/254,085 is a continuation of application No. 15/274,422, filed on Sep. 23, 2016, granted, now 10,188,773.
Application 15/274,422 is a continuation of application No. 14/529,217, filed on Oct. 31, 2014, granted, now 9,480,780.
Claims priority of provisional application 61/900,348, filed on Nov. 5, 2013.
Prior Publication US 2019/0151514 A1, May 23, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. A61L 31/06 (2006.01); A61L 31/10 (2006.01); C12P 7/625 (2022.01); G01N 33/50 (2006.01); A61L 27/18 (2006.01); C08G 63/06 (2006.01); A61L 27/34 (2006.01); A61L 17/10 (2006.01); C08G 63/90 (2006.01)

CPC A61L 31/06 (2013.01) [A61L 17/105 (2013.01); A61L 27/18 (2013.01); A61L 27/34 (2013.01); A61L 31/10 (2013.01); C08G 63/06 (2013.01); C08G 63/90 (2013.01); C12P 7/625 (2013.01); G01N 33/5088 (2013.01); Y10T 436/201666 (2015.01)]

28 Claims

1. A composition comprising a polyhydroxyalkanoate polymer that has been extracted and purified from a biomass, wherein the composition comprises at least 97.7% polyhydroxyalkanoate polymer by weight as determined by gas chromatography, wherein the polyhydroxyalkanoate polymer has a weight average molecular weight that ranges from 20 kDa to 200 kDa, and wherein the composition has: (i) a nitrogen content of less than 40 ppm, (ii) a sulfur content of less than 50 ppm, and (iii) a heavy metal content of less than 20 ppm.