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I'm absolutely not a patent lawyer but it seems like a pretty obvious idea from basic engineering principles that a bigger spider would be stiffer, and there are already several crank BCD designs with various known trade-offs, so this design would be obvious to the "skilled person" who designs this sort of thing for a living. So I doubt it meets threshold for an "inventive step".
https://raketacomponents.com/200-bcd-crankset/
Can you licence or patent a bolt pattern? Surely the idea of 7 bolts in a 200mm diameter circle isnt that unique?