Can I file a declaratory judgment action instead of waiting to be sued?

What makes a dispute concrete enough?

Under 28 U.S.C. 2201 and MedImmune v. Genentech, the court considers all the circumstances: the parties must have adverse legal interests in a substantial dispute with enough immediacy and reality for judicial resolution. Concern about a patent alone does not answer that test. A detailed infringement accusation, the parties' communications, and the accused activity belong in the assessment.

Does filing first secure my preferred court?

No choice of court is automatic. Analyze jurisdiction and venue before filing, along with the requested declaration and existing proceedings. Section 2201 says a court may grant declaratory relief; establishing a controversy does not make every requested declaration mandatory.

Can the complaint affect an IPR petition?

Yes. Under 35 U.S.C. 315(a)(1), an earlier civil action by the petitioner or its real party in interest challenging a patent claim's validity can bar institution of an IPR. A counterclaim challenging validity is excluded from that provision by 315(a)(3). Coordinate the contents and timing of any court complaint with the proposed Patent Office challenge.