REST - get custom user profile property - on premise - Infopath

I want to retrieve a custom field from the user profile property with rest. The property is searchable in search. Name of the custom properties "CompanyNumber"

But when I try to use http://ift.tt/1u9jqin

it does not retieve the custom properties, only the built in properties like :

• AccountName


• DirectReports


• DisplayName


• Email


• ....

I get a node that says UserProfileProperties where there is a Key? But how do I use this?

INFOPATH

I have to use infopath so pure javascript does not work :(

What I realy want to do is to type in the CompanyNumber and then the adress / postnumber / etc. get autopopulated