When a domain name reaches its expiration date, it usually gets into redemption period for about 30 days. After this 30 days, it will get into the pending-delete state in the registry for about five days. So, for this 30+5 days, your information will still be shown in the whois database. When this time is up, the registry will delete this domain and it will then be available to anyone who wants to register the domain at any registrar.