As you said, there are several reasons: 1. The boss of the company has a bad idea about property rights; 2. To apply for a patent, you have to disclose the secret recipe, which is easy to leak, so it is better to keep it secret; 3. The patent must be handed over 4. This technology already exists abroad, and other companies have also done it. It is not easy to apply for approval. It is definitely not a scientific and technological invention, but there is no problem with utility models!