Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
American Zinc Co
American Zinc Lead and Smelting Co
Original Assignee
American Zinc Co
American Zinc Lead and Smelting Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Zinc Co, American Zinc Lead and Smelting CofiledCriticalAmerican Zinc Co
Application grantedgrantedCritical
Publication of FR792825ApublicationCriticalpatent/FR792825A/fr