No, your invention patent has entered the substantive examination process. It means that the invention patent has been published. Therefore, your invention patent has become existing technology, and if you apply for a utility model now, it is almost certain that your utility model will be rejected because it lacks novelty. Nowadays, the utility model preliminary examination will also be searched. This is your own application by the same person, and it is almost impossible for the examiner to fail to search. To put it bluntly, if you directly apply for a utility model without changing the content of the invention patent or with slight changes, it will definitely be rejected. Of course, you can also improve your creation to make it creative, and then apply for a utility model. In this way, this utility model can still be authorized.