Based on my knowledge (which is admittedly not expert). You really can't bend the knee too much for 10 weeks or so. Most likely they drilled some holes thru your kneecap and literally tied the tendon to the bone. It takes 8-12 weeks for the 2 to "grow" back together. Any major knee bending during that time will just rip it back apart again - trust me, you will feel this. If you bend it too much, you can rip the sutures used to tie the 2 together and well.... then you are back to step 1.
The trick is to keep the quad strong during the time that you cannot bend your knee. Straight leg lifts, straight leg balancing, etc. Once your tendon heals, I promise you will have no knee pain and no issues with it... but your quad will be weak.
After your patella tendon heals, the trick is to not do anything too crazy until your quad is back strong or you risk tearing PCL, MCL, ACL mainly just because your knee is weak.
A little snowboarding in mid Feb is not out of the question. Late December could be sketchy - at this point, everything will depend on your quad strength and how much risk you want to put on tearing something else...
For now -
Keep your quad strong with no knee bending
Mid November -
One Legged Squats