Jaroslav Flegr, Jan Havlíek and Jitka Hanuova-Lindova, and to David Hanauer, Naren Ramakrishnan, Lisa Seyfried, for investigating whether it is mentally hazardous for a human being to own a cat.
Section 101: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title.
The supreme court has over the last century defined what the words in that statement mean.
The word "abstract" is just shorthand for "not a process, machine, manufacture, or composition of matter or new and usefull improvement thereof"
The supreme court has a very narrow and limited definition of "process" for this statute.