Zaklady Chemiczne Blachownia

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5502016 Method to treat an ion-exchanger catalyst for the process of bisphenol-A synthesisExpiredMay 23, 94Mar 26, 96[B01S]
5470809 Method to treat an ion-exchanger catalyst for the process to synthesize alkylphenolsExpiredMay 10, 94Nov 28, 95[B01J]
5198591 Method to manufacture bisphenol AExpiredNov 22, 91Mar 30, 93[C07C]
4906789 Methods for bisphenol A productionExpiredSep 28, 88Mar 06, 90[C07C]

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