Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
Inventor
active
Cigarette filter material comprising compounds of iron in high o
Cigarettes having minimized loose ends and a process for prepari
Combustible carbon filter and smoking product
Composite rigid sponge structure
Filter material for selective removal of aldehydes for cigarette
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