There are three ways to apply for a patent in the United States:
1. Apply for a patent directly to the United States (confidentiality review is required in China Patent Office in advance, and after the confidentiality review is passed, you can apply for a patent directly to the United States);
2. Apply for a patent in the United States through the Paris Convention (the priority is only 12 months);
3. Apply for a patent in the United States through the PCT Patent Cooperation Treaty (priority can reach 30 months).
-Lite carving patent