	US 12,303,613 B2
	High-strength collagen sponge
Ken Nakata, Osaka (JP); and Gaku Kanno, Yamagata (JP)
Assigned to KOKEN CO., LTD., Tokyo (JP); and OSAKA UNIVERSITY, Osaka (JP)
Filed by KOKEN CO., LTD., Tokyo (JP); and OSAKA UNIVERSITY, Osaka (JP)
Filed on Dec. 19, 2022, as Appl. No. 18/083,598.
Application 18/083,598 is a division of application No. 16/474,074, granted, now 11,559,603, previously published as PCT/JP2017/045955, filed on Dec. 21, 2017.
Claims priority of application No. 2016-254788 (JP), filed on Dec. 28, 2016.
Prior Publication US 2023/0414830 A1, Dec. 28, 2023
Int. Cl. A61L 27/24 (2006.01); A61L 27/56 (2006.01); C08J 9/28 (2006.01)

CPC A61L 27/24 (2013.01) [A61L 27/56 (2013.01); C08J 9/28 (2013.01); A61L 2430/06 (2013.01); C08J 2201/048 (2013.01); C08J 2389/00 (2013.01)]

10 Claims

1. A collagen sponge, comprising a porous construct having a pore structure, wherein a force (N) at a time of a start of breakage of the collagen sponge is 1 N or more and 5 N or less in any direction, wherein the collagen sponge has an average pore diameter falling within a range of 1 micron or more and less than 50 micron.