MPEP § 2306
*****
*****
Once an interference is declared, an opposing party is entitled to access to the application and benefit applications. 37 CFR 41.109. See MPEP § 2307.02. Consequently, an interference should not be suggested for an application under a secrecy order. See MPEP § 120 and § 130. When a secrecy order expires or is rescinded, if the examination is otherwise completed, 37 CFR 41.102, then the need for an interference may be reconsidered.
If an application not under a secrecy order has allowable claims that interfere with allowable claims of an application that is under a secrecy order, then the application that is not under the secrecy order should be passed to issue as a patent. An interference may be suggested with the application and the patent (unless the patent has expired) once the secrecy order has been lifted.
Example
Application L discloses and claims a transistor that is useful in a commercial context. Application M discloses the same transistor in the context of a missile control circuit, but claims only the transistor. A secrecy order is placed on application M. Once examination of application L is completed and the transistor claim is allowable, application L should pass to issue.