Mealey's (June 18, 2015, 4:42 PM EDT) -- PITTSBURGH — Coal Gas Recovery LLC (CGR) on Aug. 25, 2014, filed its answer disputing claims filed by Effective Exploration LLC that allege that drilling techniques CGR is using in its hydraulic fracturing operation infringe on patents held by Effective Exploration (Effective Exploration LLC v. Coal Gas Recovery LLC, et al., No. 14-00845, W.D. Pa.)....