US PATENT SUBCLASS 502 / 417
.~.~ And specified adde active sorbent material


Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

400  DF  SOLID SORBENT {6}
416  DF  .~ Free carbon containing {3}
417.~.~ And specified adde active sorbent material


DEFINITION

Classification: 502/417

And specified added active sorbent material:

(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.