That doesn't look too good.
Are there any signs that the tree is still alive? - any green leaves etc? Is this just a particularly bad branch or typical of the whole tree?
If this is typical of almost all of the tree try gently scraping a small area of one of the affected branches. Is there any green under the bark?
What has been the regime for watering / feeding (especially during the very hot / dry spell in July)?
What size tree is it & what size pot? Is it in a sheltered location or windy? What is the aspect - ie does it get the full brunt of the sun - especially at the hottest part of the day or does it get some shade?
Are there any obvious signs of disease? - weeping wounds, scabs (yuck - sounds like Emergency Ward 10 - to show my age!).
Sorry to ask so many questions but from the picture the tree looks like a gonna - so just trying to help you identify why this might be. If, however, there's a bit of life in it we might be able to save it if we have enough info.