Yesterday, the United States Patent and Trademark Office issued more guidance on what is patent eligible after the Supreme Court's Alice decision. The new document, which includes a series of examples of eligible and ineligible claims, supplements the Office's December Interim Guidance. In general, the examples continue to reinforce the growing trend of relying upon the older “machine or transformation” test to determine eligibility.
Another key element of eligible claims is to focus on the unique problem to be solved rather than casting the claims as broader, abstract ideas. For example, in example 2, the Office states that the claim was not directed to a judicial exception because it addressed a unique problem for the internet, keeping visitors on a particular website.
The examples themselves can be found here.