Aligons,
a true 9th chord has a root, third, fifth, flat seven, and ninth
a true 11th has a root, third fifth, flat seven, ninth, and eleventh
a true 135th has a root, third, fifth, flat seven, ninth, eleventh, and thirteenth
These are dominant.
To make these chords major you would just raise your flat seventh a half step back to a true seventh.
To make these chords minor you would flat the seventh and the third.
I hope this helps a little.
Peace,
Funkinater