abandoned, suppressed, or concealed,adj. Patents. Intentionally or accidentally hidden from
public notice, not reduced to practice, or not patented. • Another person’s earlier invention will not
be considered prior art if the first inventor abandoned the field to others or is held to have lost the
right to patent by suppressing or concealing the invention. But if the suppression or concealment
occurred after the art became known to the public, then it still qualifies as prior art. See MPEP §
2138.03. [Cases: Patents 82. C.J.S. Patents §§ 114–118.]

[Blacks Law 8th]