by adding materials intended to remove free oxygen or to develop inhibitor gases, e.g. vapour phase inhibitors

Preserving, protecting or purifying packages or package contents in association with packaging > Sterilising, e.g. of complete packages > Sterilising contents prior to, or during, packaging > by adding materials intended to remove free oxygen or to develop inhibitor gases, e.g. vapour-phase inhibitors

Preserving, protecting or purifying packages or package contents in association with packaging (by packaging under special atmospheric or gaseous conditions B65B31/00; devices for placing protecting sheets, plugs, or wads over contents B65B61/22) > Sterilising, e.g. of complete packages > Sterilising contents prior to, or during, packaging > by adding materials intended to remove free oxygen or to develop inhibitor gases, e.g. vapour phase inhibitors