Narrative:

Pilot asked to stay at 6000 ft for as long as possible due to heavy fuel. I highlighted the aircraft to remind myself to climb him before the minimum IFR altitude increased from 6000 ft to 7000 ft. He was slow so it took 20 to 49 minutes and I forgot. Data block flashed MSAW (minimum safe altitude warning) and I climbed him. I should have made another indication on my scope besides the highlight; like kept the mia map up or alter his data block.

Google
 

Original NASA ASRS Text

Title: Center Controller reported they forgot to climb an aircraft in a timely manner and it flew below the Minimum IFR Altitude.

Narrative: Pilot asked to stay at 6000 ft for as long as possible due to heavy fuel. I highlighted the aircraft to remind myself to climb him before the Minimum IFR Altitude increased from 6000 ft to 7000 ft. He was slow so it took 20 to 49 minutes and I forgot. Data block flashed MSAW (Minimum Safe Altitude Warning) and I climbed him. I should have made another indication on my scope besides the highlight; like kept the MIA map up or alter his data block.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.