The filing, which was discovered by AutoGuide, says this idea "produces eleven forward speed ratios and one reverse speed ratio by selective engagement of three shift elements in various combinations," and the company outlines three different ways of making this possible. The advantage of adding one more ratio is that the gearbox should be able to keep the revs in the ideal portion of the engine's torque curve even longer.
Obviously, automakers patent ideas constantly, and applying for one is no guarantee that the tech ever arrives on the market. Conversely, these documents provide a tiny glimpse at one of the brand's focuses of development. If you're mechanically minded or just curious, you can read the entire application here for the technical nitty-gritty.