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
Priority claimed from US08/490,190external-prioritypatent/US5656206A/en
Application filed by Ppg Industries IncfiledCriticalPpg Industries Inc
Priority to SG1996010941ApriorityCriticalpatent/SG63675A1/en
Publication of SG63675A1publicationCriticalpatent/SG63675A1/en