Hello, after the patent application, it should be made public when the utility model is authorized. The invention patent will be made public automatically after 18 months, and your technical scheme will also be made public. Then, during the protection period, if someone else produces the same thing as your public technical scheme, it is infringement.
Patents need to be made public in exchange for protection.
If the protection period expires, you have no right, and others can use your open technical scheme at will.
As soon as your product is sold, others will know immediately. Unless you are in the field of chemistry and medicine, others can't know the specific composition of your product from your product. If it is mechanical, as soon as you sell the product, others will know what structure you are, so you can only protect it through patents.
Codeword is not easy, hope to adopt!