280 A.2d 463 Pittsburgh v. Cities Service Oil Company. Commonwealth Court of Pennsylvania.Argued June 2, 1971 August 3, 1971. Taxation — Mercantile license tax — Act 1947, June 20, P. L. 745 — Nature of taxable entity — Statute of limitations — Tax refunds — Interest. 1. A mercantile license tax assessed under the Act […]