31340203cellulosicPT2026-03-30 20:31:45UF31340204cellulosic plasticNDBT31340150thermoplasticPTBT31316772cellulose by productPTNT31371018cellulose acetatePTNT31371022cellulose etherPTNT31371024nitrocellulosePTNT31371029celluloidPTNT31371033pyroxylinPTNT31371034collodionPT