Copyright and Patents on ICLR Papers

According to U.S. Copyright Office's page What is a Copyright. When you create an original work you are the author and the owner and hold the copyright, unless you have an agreement to transfered the copyright to a third party such as the company or school you work for.

Authors do not tranfer the copyright of their paper to ICLR, instead they grant ICLR a non-exclusive, perpetual, royalty-free, fully-paid, fully-assignable license to copy, distribute and publicly display all or part of the paper

Patents

You cannot file a patent once a paper is publicly disclosed.  The US has a 1-year grace period