Manufacture of X-ray absorbing glass composition by a float glass process
Patent 4015966 Issued on April 5, 1977. Estimated Expiration Date: 
April 5, 1994. 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.
April 5, 1994. 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.Patent References 3808154 3925052 3925089 InventorAssigneeApplicationNo. 05/691929 filed on 06/01/1976US Classes:65/99.4, Treating or removing impurities in molten metal or glass501/62, And aluminum501/64, And yttrium or rare earth (i.e., elements with atomic numbers 39 or 57-71)501/69, And divalent metal oxide (e.g., oxides of zinc, cadmium, beryllium, alkaline earth metal, magnesium, etc.)501/70Calcium oxide containingExaminersPrimary: Kellogg, Arthur D.Attorney, Agent or FirmAbstractDisclosed is a technique for melting X-ray absorbing glass compositions by a process wherein molten glass is floated or supported on a bath of molten tin. The X-ray absorbing glass compositions are free of the oxides of lead, arsenic, antimony, bismuth, cadmium, and other readily reducible oxides to prevent discoloration of the glass upon contact with molten metal. | |
