US Utility Patent Process: What Foreign Applicants Should Know
- July 4, 2025
- Posted by: Patntech
- Categories: Blog, Patents

A US utility patent represents a significant accomplishment for companies and inventors worldwide. It’s more than just paperwork; it’s a means to safeguard your ideas, preserve your hard work, and open doors in the vast US market. However, the process can initially appear daunting if you’re applying from outside the United States. The good news? It’s completely achievable and well worth the effort if you plan properly and receive the right direction.
In this guide, PatnTech will dissect the fundamentals of the US utility patent process so that international applicants can proceed confidently.
What Is a US Utility Patent?
The United States Patent and Trademark Office (USPTO) most frequently issues utility patents. It safeguards novel and practical inventions, including machinery, procedures, manufactured goods, and even chemical compositions.
A US utility patent normally provides 20 years of protection from the date of application filing. That’s twenty years where your invention receives the legal support it needs.
Can Foreign Inventors Apply for a US Utility Patent?
Yes, without question! The USPTO encourages applications from companies and inventors outside of the United States.
When Is the Deadline to File a US Utility Patent Application?
The deadline for filing a US utility patent application varies depending on whether you have filed a foreign utility application. The following deadlines apply when you want to benefit from the earlier filing date of your foreign utility patent application:
- If you have filed a foreign utility patent application, then you must file a US utility patent application within 12 months of the foreign filing date.
- If you have filed a PCT application, then you must file a US national stage application within 30 months of the priority date.
However, you must also understand the following extra steps and instructions:
- You must be legally represented before the USPTO by a registered US patent attorney or agent.
- Seek a foreign filing license. Prior to filing your patent application in the US, you may need permission based on your home country’s laws.
Also Learn: How to File a Patent in the US from India
A Simple Overview of the US Utility Patent Process
1️⃣ Check If Your Invention Is Patentable
Prior to launching the application, confirm that your creation is:
- Novel (no one else has patented it yet)
- Non-obvious (not a clear advancement over pre-existing concepts)
- Useful (it fulfills a useful function)
Conducting a prior art search — basically, checking existing patents and publications — is a smart first step.
2️⃣ Choose How You Want to File
- Direct Filing: Submit a non-provisional utility patent application directly to the USPTO.
- PCT Route: If you’ve filed in your home country first, you can apply in the US via the Patent Cooperation Treaty (PCT) — usually within 30 months of your first filing date.
3️⃣ Prepare and Submit Your Application
Your application must be thorough and detailed. It should contain:
- A description of your innovation in a specification
- Claims (which specify what is covered)
- Illustrations (if required)
- Inventor details
- An oath or signed declaration
- Fees
The majority of international applicants decide to have a US-licensed patent lawyer prepare and submit their application since it truly helps them avoid expensive errors.
4️⃣ The Examination Process
A USPTO patent examiner reviews your application once it is filed. They will review it to make sure it satisfies all legal standards.
They will send you an Office Action if they find problems; this is your opportunity to reply and modify your application. Successfully handling these responses promptly maintains the course of your patent journey.
5️⃣ Approval and Maintenance
If all goes well, you will receive a Notice of Allowance. Your US utility patent will be granted when you pay the issue fee.
Remember that you will pay maintenance costs at 3.5, 7.5, and 11.5 years to keep your patent active.
Key Points Foreign Applicants Should Remember
- Applications Must Be in English — Submit a certified English translation if your initial application was submitted in a different language.
- You Need US Representation – Foreign applicants must be represented by a USPTO-registered lawyer or agent.
- Pay close attention to deadlines, particularly if you are asserting priority from a previous filing in your nation of origin.
- Before filing in the US, find out if your country requires a foreign filing license.
Need Help Navigating the Process?
Obtaining a US utility patent does not have to be difficult for a foreign applicant. PatnTech can help you draft and file a US patent application.