Nottinghamshire Second XI were unable to take the ten wickets needed for victory on the final day as Derbyshire held firm for the draw.
Resuming on 38-0, still 262 runs behind the Nottinghamshire first innings total of 489, it was not until the 16th over of the day that the home side broke through.
Gemaal Hussain trapped Slater LBW for 35 as the first wicket stand came to a close with the score on 70.
Sam Wood then had Tom Wood LBW for 39 but that was the last of the wickets before lunch as Chesney Hughes and Wes Durston, on 30 and 36 respectively, guided the visitors to 145-2.
After lunch, both batsmen carried on where they left off as they each made fifty further guiding Derbyshire further towards a hard fought draw.
Durston made his in the 47th over before Hughes followed suit in the 49th, just after the hundred partnership had been brought up.
However, just as they were cruising towards the tea interval, three quick wickets left the home side in with a shout of pushing for victory.
Durston (72) was Wood’s second victim before Hussain removed Clare without scoring and then Hughes for 72 to leave the score on 233-5 heading into tea, Callum Broderick on ten and Greg Cork on nine.
In the final session of the match the visitors resisted and it was the last ball of the 80th over which brought the break through.
Cork (22) was adjudged LBW to Adam Tillcock with Tom Knight coming in and Nottinghamshire taking the new ball.
Derbyshire edged ever closer to the 300 mark and in the 88th over Brett Hutton had Broderick (30) caught by keeper Matt Cross with the score on 297-7.
The visitors remained stubborn until the end and after 106 overs with the score 334-7 a draw was agreed, Knight 26 not out and Ball 12 not out, Hussain returning the best bowling figures of 3-34 off 14 overs.