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
CA781113A
Inventor
H. Welker Robert
E. Krieger Arthur
L. Helmbrecht William
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.)
Libbey Owens Ford Glass Co
Original Assignee
Arthur E Krieger
Robert H Welker
William L Helmbrecht
Libbey Owens Ford Glass Co
Publication date
Application grantedgrantedCritical
Publication of CA781113ApublicationCriticalpatent/CA781113A/en