(under subclass 416) Composition to which a material, not found in the original source or carbon, has been added to enhance sorbability by its presence.
(1) Note. This subclass requires a named additive intended to contribute to the function by its presence and not by its action on carbon and does not include an activating agent such as nitric acid added during an activating process.
(2) Note. Animal or bone black is 80% Ca3[end subscrpt] (PO4)2[end subscrpt], and a patent claiming a mixture of its with another source of carbon is proper for this subclass.
