The MeV properties of the blazars PKS 1622-297, 3C 454.3 and CTA 102 have been analyzed using COMPTEL data (0.75-30 MeV). Our results show significant detections of PKS 1622-297 (5.9σ) in the 10-30 MeV band during its γ ray flare in 1995, and of 3C 454.3(5.6σ) in the sum of 8 years observations in the 3-10 MeV band. By comparing the MeV results to the ones obtained in neighboring bands by the Compton Gamma Ray Observatory (CGRO) experiments EGRET and OSSE, we reveal some properties of these 3 blazars at γ ray energies.
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