can't test for input checked in each loop

I have a simple object of input checkbox elements and want to check in an each loop which ones are checked and the do stuff. The checkboxes are in one tr in several td's in a table.

Here is my code:

$('table.occupancy-table').on('change', '.minimum_stay input', function() {
    var minimumStayInputs = $(this).closest('tr').find('input');
    $(minimumStayInputs).each(function(){
        if(this.prop('checked')) {
        //do stuff
        }
    }
}

If I console.log this in the each loop, I get data like:

<input id="R11520" type="checkbox" name="minimum_stay[152][1442786400]" value="checked"> <input id="R11521" type="checkbox" name="minimum_stay[152][1442872800]" value="checked">...

But I always get an error Uncaught TypeError: this.prop is not a function from this.prop('checked'). I also tried .is(":checked") with the same result.

Any ideas what the reason might be?

Let me know if you need sample html or I should create fiddle.