Is there really a roxycottin or is it all generic oxycodone??

ok so roxicet is instant release.
a note about the oxy's. as far as i know the time released oc's come in 10, 15, 20, 30, 40, 60 and 80. I also believe they have 5mg OC's now as well. those are the time release. unless i am mistaken, which im not, the oc's have the outer coating which when removed makes the pill no long extended release