US 11,691,382 B2
Uses of microbial derived materials in polymer applications
Matthew Sterbenz, Salt Lake City, UT (US); Daniel Malmrose, Salt Lake City, UT (US); and Scott Franklin, Berkeley, CA (US)
Assigned to CHECKERSPOT, INC., Alameda, CA (US)
Filed by Checkerspot, Inc., Alameda, CA (US)
Filed on Jun. 15, 2022, as Appl. No. 17/840,989.
Application 17/840,989 is a continuation of application No. PCT/US2020/065614, filed on Dec. 17, 2020.
Claims priority of provisional application 62/965,599, filed on Jan. 24, 2020.
Claims priority of provisional application 62/949,903, filed on Dec. 18, 2019.
Prior Publication US 2022/0324198 A1, Oct. 13, 2022
Int. Cl. B32B 5/18 (2006.01); B32B 21/04 (2006.01); C08G 18/42 (2006.01)
CPC B32B 5/18 (2013.01) [B32B 21/047 (2013.01); C08G 18/42 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An elongate composite article comprising:
a plurality of elongate polyurethane foam layers;
a plurality of elongate wood layers, wherein each elongate polyurethane foam layer of the plurality of elongate polyurethane foam layers is laminated to one or more elongate wood layers of the plurality of elongate wood layers;
an upper surface formed from both the plurality of elongate polyurethane foam layers and the plurality of elongate wood layers; and
a lower surface formed from both the plurality of elongate polyurethane foam layers and the plurality of elongate wood layers, wherein the distance between the upper surface and the lower surface is less than 20 mm,
wherein the article has a specific strength at yield of about 0.5 MPa/kg·m3 to about 2 MPa/kg·m3 as assessed by three-point bend flexural testing, wherein a load is applied downward to the upper surface of the article.