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Priority to JP1884369ApriorityCriticalpatent/JPS4844198B1/ja
Priority to US823Aprioritypatent/US3669927A/en
Priority to GB984/70Aprioritypatent/GB1235998A/en
Priority to DE2003042Aprioritypatent/DE2003042B2/de
Priority to FR7002786Aprioritypatent/FR2029485A1/fr
Publication of JPS4844198B1publicationCriticalpatent/JPS4844198B1/ja
Polycondensing bis(hydroxyalkyl) therephthalates in the presence of small amounts of a germanium compound and a sterically hindered bisphenol or trisphenol