There are a few things that cannot be patented in the United States. These include:
-Laws of nature: You can't patent the law of gravity, for example.
-Natural phenomena: You can't patent a tornado or an earthquake.
-Abstract ideas: You can't patent an idea for a new business model or a new way to do math.
-Literary, musical, and artistic works: You can't patent a novel or a painting.
-Products of nature: You can't patent a plant or an animal.