Just in case, you might want to start stashing a couple of peanut butter and jelly sandwiches in your freezer. For now, the U.S. courts denied Smuckers a patent on its PB&J pastries, but you never know what will happen the next time out.
I'm going to go out on a limb to say that I doubt many ordinary (or even extraordinary) people think you could possibly patent the way you make a sandwich. There are surely a multitude of ways to create PB&J, from adding peanut butter to one side, or both sides, or even using crunchy peanut butter. As stated from the above link, Smucker's already has the patent for creating the peanut butter shield: adding it to both sides of the bread, with the jelly in the middle.
You should be careful next time you make a PB&J sandwich as to not infringe on any withstanding patents. Take my advice and put the peanut butter on all four sides.