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.)
Beazer East Inc
Original Assignee
Koppers Co Inc
Filing date
Publication date
Application filed by Koppers Co IncfiledCriticalKoppers Co Inc
Application grantedgrantedCritical
Publication of AU166971B2publicationCriticalpatent/AU166971B2/en
Publication of AU2238753ApublicationCriticalpatent/AU2238753A/en