bfwebster writes "A set of pharmaceutical process patents for 'evaluating and improving the safety of immunization schedules' (Classen v. Biogen et al.; see US Patents 6,420,139; 6,638,379; 5,728,385; 5,723,283) were held to be invalid due to unpatentability. The decision was appealed to the US Court of Appeals for the Federal Circuit, but was upheld with a terse citation to In re Bilski (which decision we discussed here). Here's the entire text of the appeals decision: 'In light of our decision in In re Bilski, 545 F.3d 943 (Fed. Cir. 2008) (en banc), we affirm the district court's grant of summary judgment that these claims are invalid under 35 U.S.C. 101. Dr. Classen's claims are neither "tied to a particular machine or apparatus" nor do they "transform a particular article into a different state or thing." Bilski, 545 F.3d at 954. Therefore we affirm.' It will be interesting to see what happens when these same standards start getting applied to software-related patents."