Make sure to double-check your contract with the company to make sure there is no clause stating that any work created (in the office or not) belongs to them; i

Make sure to double-check your contract with the company to make sure there is no clause stating that any work created (in the office or not) belongs to them; if so, double-check to ensure your project was listed as prior art. If the contract has something along these lines, you're in a tough position.