Inventor
BARTHEL RALPH EDWARD
US8 patents
⚠️ This page may combine multiple inventors who share the name “BARTHEL RALPH EDWARD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PREFERRED TECH LLC
7 patentsUS9725645B2Aug 8, 2017
Proppant with composite coating
PREFERRED TECH LLC41 citations93
US10100247B2Oct 16, 2018
Proppant with enhanced interparticle bonding
PREFERRED TECH LLC5 citations82
US9518214B2Dec 13, 2016
Proppant with polyurea-type coating
PREFERRED TECH LLC6 citations82
US10208242B2Feb 19, 2019
Proppant with polyurea-type coating
PREFERRED TECH LLC3 citations71
US11760924B2Sep 19, 2023
Proppant with enhanced interparticle bonding
PREFERRED TECH LLC0 citations61
US11098242B2Aug 24, 2021
Proppant with enhanced interparticle bonding
PREFERRED TECH LLC0 citations61
US10544358B2Jan 28, 2020
Coated and cured proppants
PREFERRED TECH LLC1 citations61