As I know "claim" is used in legal actions like "claim an ownership" and "demand" is used in a purchase-like act like "demand a product". Dictionary.com says a very similar description, similar at least to me.
Could you please help make it clear to me?
Learn English – the difference between “claim” and “demand”
synonymsusageword-choice
Best Answer
There are two senses to the meaning of claim, and the one that matters here is
Notice "demand or request". You can be as meek as a mouse when claiming something, waiting in lines and filling out forms. But at the end, you expect to get the thing that's yours by right.
For example,
Not so "demand". A demand is up front and in your face. And it's not necessarily backed up by any right, authority, or even reason.