What constitutes “secret use” in patent law?

What constitutes “secret use” in patent law? In patent law, “secret use” refers to the use of an invention that is kept confidential and not accessible to the public. The Manual of Patent Examining Procedure (MPEP) 2152.02(c) states: “An inventor’s private use or sale of the invention is not prior art under AIA 35 U.S.C.…

Read More

Can a secret use of an invention constitute public use?

Yes, in some circumstances, a secret or confidential use of an invention can constitute public use under pre-AIA 35 U.S.C. 102(b). The MPEP explains: “[S]ecrecy of use alone is not sufficient to show that existing knowledge has not been withdrawn from public use; commercial exploitation is also forbidden.” (MPEP 2133.03(a)) This means that even if…

Read More