Regional Jet 200 ER/LR (CRJ200)
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 12
Communication Breakdown; Situational Awareness
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification
ATC Equipment / Nav Facility / Buildings; Procedure; Human Factors; Airspace Structure
Tower called for a release on Aircraft X and a release was given. The aircraft checked on and I climbed the aircraft to 19;000 feet and indicated so on the strip. About 15-20 minutes later Aircraft X asked if they were still with me. I looked for them on the scope in my airspace and in the adjacent Center's airspace; and asked them to verify code. I checked for a Departure message and the flight plan was already departed. They verified their squawk code. The code came up about 45 miles into the adjacent Center airspace at 19;000 feet. I called the adjacent sector; got the data block tracked up and gave Radar Contact. I don't know for sure; but suspect the transponder was never turned on.
ZMP Controller reported failing to acquire a Departure Controller's data tag on their radarscope and forgetting about the aircraft; which entered adjacent airspace without a hand off.