A red KeyCite flag on a patent or trademark means:

a) All or part is invalid, invalid and not infringed, all or part of a patent is unenforceable due to the patentee's inequitable conduct, or a trademark is cancelled.

b) It's amended, repealed, superseded, or held unconstitutional or preempted in whole or in part.

c) It's no longer good for at least one point of law.