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.)
Expired
Application number
Inventor
Thomas Kerr Johnson
William Mckean
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.)
Individual
Original Assignee
Individual
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 IndividualfiledCriticalIndividual
Application grantedgrantedCritical
Publication of GB190400753ApublicationCriticalpatent/GB190400753A/en
753. Johnson, T. K., and McKean, W. Jan. 12. Incandescent gas lamps.-Mantles are toughened by dipping in a solution of sulpbate of alum and then drying.
GB190400753D1904-01-121904-01-12An Improvement connected with the Mantles of Incandescent Gas Burners.
ExpiredGB190400753A
(en)