Yeah, that was the first problem. The appellate judges pointed out that everybody’s mother in USA makes PB&J sandwiches and that everybody knows to spread peanut butter on both slices of bread with jelly in the middle to keep it from leaking through the bread. (My mother didn’t do it that way, but we’ll let that slide, it’s still a pretty basic idea.)
Smuckers tried to get around that by arguing that their crimping the edges made it unusual (“novel”) enough to patent. Whereupon the patent office solicitor general went up to the podium and started pulling out about 10 pictures of past food products with crimped edges to show there was nothing new about crimping either. Raviolis, pierogis, fruit pies etc. It was hard not to laugh out loud. One of the raviolis actually looked like a miniature version of the Uncrustable.