Battery recycling has an image problem: it sounds like garbage collection. The filings say otherwise. The metals inside a spent lithium-ion cathode — cobalt, nickel, lithium — are the same metals a cell maker would otherwise buy from a mine, and recovering them is increasingly cheaper than digging them up.Nissan North America's US10777843B2, granted in September 2020, is a clean illustration. It claims regenerated lithium-ion cathode materials with modified surfaces — the idea is to take cathode powder out of a dead cell and rebuild its surface so it works again, rather than dissolving it to raw salts and starting over. Direct regeneration like this skips the most energy-intensive steps of conventional recycling.The off-take read is what makes this a markets story. A carmaker that can regenerate its own cathode material has a hedge against cobalt and nickel price spikes, and a partial answer to the supply-security question that haunts every EV program. The recycled stream is not charity; it is a second mine with a shorter, more predictable supply line.There is a catch the patent does not solve: feedstock. Direct regeneration works best on clean, sorted cathode powder of known chemistry. The messy reality — mixed chemistries, contaminated black mass, packs designed to be hard to disassemble — is where the economics get thin. The 2020 grant is a piece of the puzzle, not the whole machine.Watch the CPC code H01M 10/54, the office's label for reclaiming materials from batteries. When that code starts showing up attached to carmakers and cell builders rather than just specialist recyclers, it is a sign the industry has decided recycling is part of the supply chain, not an afterthought bolted on at end of life.For batteryfolio, the question is always whether it pencils, and recycling pencils only when metal prices are high and feedstock is clean. The 2020 filing is an early bet that both conditions would hold — a bet the rest of the decade would test.