Benzinga | Apr 8, 2021 10:56AM EDT

ImmunoGen US Patent & Trademark Office Abstract For Co.'s 'SELECTIVE SULFONATION OF BENZODIAZEPINE DERIVATIVES'

http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220210101871%22.PGNR.&OS=DN/20210101871&RS=DN/20210101871