US 12,403,213 B2
Wound dressing with selective and dynamic transparency
Christopher B. Locke, Bournemouth (GB); and Timothy M. Robinson, Wimbourne (GB)
Assigned to Solventum Intellectual Properties Company, Maplewood, MN (US)
Appl. No. 17/421,293
Filed by Solventum Intellectual Properties Company, Maplewood, MN (US)
PCT Filed Jan. 9, 2020, PCT No. PCT/US2020/012901
§ 371(c)(1), (2) Date Jul. 7, 2021,
PCT Pub. No. WO2020/154107, PCT Pub. Date Jul. 30, 2020.
Claims priority of provisional application 62/795,714, filed on Jan. 23, 2019.
Prior Publication US 2022/0072193 A1, Mar. 10, 2022
Int. Cl. A61F 13/02 (2024.01); A61F 13/00 (2024.01); A61F 13/05 (2024.01); A61L 15/24 (2006.01); A61L 15/42 (2006.01)
CPC A61L 15/425 (2013.01) [A61F 13/0243 (2013.01); A61F 13/05 (2024.01); A61L 15/24 (2013.01); A61F 2013/00182 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A wound therapy system comprising:
a conformable foam dressing layer; and
a conformable drape layer configured to extend over and adhere the conformable foam dressing layer to a treatment site, the conformable drape layer comprising at least two layers of polymeric polarizing filter;
wherein in a first state, the conformable drape layer is opaque;
wherein in a second state, the conformable drape layer becomes transparent when a disclosing liquid with a refractive index within a range of the refractive index of the conformable drape layer is applied to the conformable drape layer; and
wherein in a third state, the conformable drape layer becomes opaque as the disclosing liquid evaporates.