Patent ID: 7793787

Claim:
A leukocyte removal medium which has at least a surface portion composed of a polymer having the general formula -(D) o -(E) p -(F) q - (II) in which D is E is F is R 1 , R 4 , R 6 , R 7 , R 8 are independently H, lower alkyl, phenyl or substituted phenyl groups; R 2 , R 5 are CH 2 —CH 2 ,CH 2 —CHR a , CHR a —CH 2 , CHR a —CHR b , CHR a —CR b R c , CR a R b —CHR c , CR a R b —CR c R d , (CH 2 ) e , where e=2-6, and R a , R b , R c , R d are lower alkyl groups and R a , R b , R c and R d maybe the same or different; R 3 is a lower alkyl, phenyl or substituted phenyl group; s is 0 or 1; X is O or NR f , where R f is H or a lower alkyl group; o+p+q=100, 0<o, p, q<100.