On www.familysearch.org/search, there are 4 Patrick Conlan's who died in America in 1897 - one of them may be yours. Can't find a death for Thomas in 1923.
Perhaps Thomas and Patrick were brothers?
There are 12 Thomas Conlans in Kildare on the 1911 Irish census, but you'd have to have more info to distinguish which one is your Thomas e.g. parents/siblings/place in Kildare/age, etc.
Good luck!
Colette