Derry's unbeaten run stretched to 10 games after Michael Rafter's equaliser cancelled out Conan Byrne's early opener for Pat's
The home side dominated the early proceedings at Richmond Park, with centre-half Kenny Browne coming close to scoring for the hosts inside the opening five minutes. Killian Brennan came tantalisingly close to getting the opener for Liam Buckley's side only moments later when he cut inside and fired a fierce shot soaring just over the crossbar.
Pat's continued to look threatening going forward, with further efforts from Conan Byrne and Chris Forrester testing visiting 'keeper Gerard Doherty. Derry wing-back Simon Madden tried an ambitious shot from outside the box but after a quick counter-attack, Chris Forrester fed a through ball for Conan Byrne to power home and give the Saints the lead.
Derry midfielder Barry Molloy, although the Candystripes' liveliest player in the first half, was booked following a vicious lunge on Brennan on the half hour mark. Then Declan Devine's men equalised just before the break, with some sluggish defending at the back allowing Michael Rafter to tap in from close range.
It was a scrappy second-half with chances at a minimum for both sides. Forrester missed a great opportunity to score the winner right at the death for the Saints but his effort sailed well over the crossbar, much to the dismay of the home support.
Derry will rue their missed opportunity to leapfrog Sligo Rovers into first place, while Pat's will be pleased with a solid performance and will have seen their confidence boosted ahead of the meeting with Bohemians on Monday night.