TY - PAT A1 - Ryan, J G A1 - Holmes, S J A1 - Hakey, M C A1 - Horak, D V T1 - Chemical and particulate filters containing chemically modified carbon nanotube structures Y1 - 2008/12/02 N1 - SU833563 IS - Patent no. 7,459,013 ER - TY - PAT A1 - Ryan, J G A1 - Holmes, S J A1 - Hakey, M C A1 - Horak, D V T1 - Exposures system including chemical and particulate filters containing chemically modified carbon nanotube structures Y1 - 2010/03/09 N1 - SU833563 IS - Patent no. 7,674,324 ER -