Exeter Hospital is asking a superior court judge to temporarily block attorneys from using their legal powers to request documents and information about the hepatitis C outbreak at the facility. Exeter Hospital is named in 25 lawsuits filed in Rockingham Superior Court by former patients who now carry the liver disease. That includes a class-action lawsuit filed by Concord attorney Peter McGrath, whose clients now include 147 former Exeter Hospital patients. A handful have tested positive for the disease. The remainder either received a negative test result or are awaiting more information.