US 11,890,785 B2
Process for manufacturing fully recyclable mining screens
Michael Lorenzo, Sewickley, PA (US); and Jean Paul Rodrigues, Chateauneuf-sur-Isere (FR)
Assigned to COVESTRO LLC, Pittsburgh, PA (US)
Appl. No. 17/297,619
Filed by Covestro LLC, Pittsburgh, PA (US)
PCT Filed Dec. 17, 2019, PCT No. PCT/US2019/066810
§ 371(c)(1), (2) Date May 27, 2021,
PCT Pub. No. WO2020/131850, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/781,650, filed on Dec. 19, 2018.
Prior Publication US 2022/0023916 A1, Jan. 27, 2022
Int. Cl. B29B 17/04 (2006.01); B29B 17/00 (2006.01); B07B 1/46 (2006.01); C08K 7/14 (2006.01); B29C 39/10 (2006.01); B29K 105/26 (2006.01); B29K 309/08 (2006.01); B29L 31/00 (2006.01); B29C 70/54 (2006.01)
CPC B29B 17/0404 (2013.01) [B07B 1/4618 (2013.01); B29B 17/0042 (2013.01); C08K 7/14 (2013.01); B29B 17/0412 (2013.01); B29C 39/10 (2013.01); B29C 70/54 (2013.01); B29K 2105/26 (2013.01); B29K 2309/08 (2013.01); B29L 2031/737 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A composite mining screen comprising:
a cast elastomer frame encapsulating a pultruded composite mining screen insert, wherein the insert contains up to 85 wt. % fibrous reinforcing material, based on the weight of the insert, and wherein a polyol component of the cast elastomer contains polymer regrind.