Patent ID: 8409851

Claim:
A carbon dioxide filter apparatus comprising: a transparent canister having an entry port and an exit port, an interior surface and an external surface; the entry port comprising a first gas permeable membrane; the exit port comprising a second gas permeable membrane; the canister including a first deposit of algae on the interior surface and containing a nutrient liquid; and whereby when carbon dioxide enters the first gas permeable membrane and contacts the deposit of algae, the deposit of algae provides a photosynthesis reaction producing oxygen, which exits through the second gas permeable membrane; a central tube operatively disposed in the canister, bounding the entry membrane, and providing an exit port; the central tube being comprised of a third gas permissible membrane and incorporating a pattern of polymer fibers; the central tube including a second deposit of algae adjacent the pattern of polymer fibers; whereby carbon dioxide enters the entry port and traverses the third gas permissible membrane and reacts with the first deposit of algae and the second deposit of algae to form oxygen; and whereby the oxygen escapes through the exit port.