Patent 5024696 Issued on June 18, 1991. Estimated Expiration Date: July 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
75/708, Stirring or agitating of molten material75/680, Adding gas75/681, Containing Halogen atom264/30, FURNACE LINING FORMATION OR REPAIR266/217Gaseous treating material