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the following shows a patent by "Piramal Healthcare Ltd" . i need a suggestion regarding its different numbers like PN,AN and PR are different.
so i want to know whichever is earlier whether PN ,AN or PR?
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PN : WO2009010908
KD : A2
PB : Jan 22, 2009
IN : HARIHARAN SIVARAMAKRISHNAN;CHAMBERS OWEN;UPARE ABHAY ATMARAM;SATAGOPAN DAMODHARAN
AP : PIRAMAL HEALTHCARE LTD;HARIHARAN SIVARAMAKRISHNAN;CHAMBERS OWEN;UPARE ABHAY ATMARAM;SATAGOPAN DAMODHARAN
AN : IB 200802008052801 Jul 11, 2008
IP :
TI : PROCESS FOR PRODUCTION OF 1,2,2,2-TETRAFLUOROETHYL DIFLUOROMETHYL ETHER (DESFLURANE)
CA :
PR : IN2007MU13432007 Jul 13, 2007
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