No. The devil proabably sinned at once after the first instant of his creation because this must be maintained if it be held that he elicited an act of free-will in the first instant of his creation, and that he was created in grace (Q62, A3).
For since the angels attain beatitude by one meritorious act (Q62, A5), if the devil, created in grace, merited in the first instant, he would at once have received beatitude after that first instant, if he had not placed an impediment by sinning.