Patents in the United States: An Overview for Foreign Businesses

Patents in the United States are central to protecting an invention in one of the world's largest markets, and the US system has features that differ enough from those elsewhere to be worth understanding before you file anything. A patent is a time-limited right that lets its owner stop others making, using, selling, offering to sell, or importing the protected invention without permission. In the United States patents are governed by federal patent law (Title 35 of the United States Code) and are granted and administered by the United States Patent and Trademark Office (the USPTO). This page frames how the system works at a high level and points to a detailed walkthrough for the mechanics. It is general information, not legal advice. For anything fact-specific, the sensible course is to consult a vetted local firm.

What a patent protects in the United States

A granted US patent gives its owner the exclusive right, for a limited period, to exclude others from making, using, selling, offering to sell, or importing the claimed invention within the United States. Protection is defined by the claims of the patent, not by the broad idea behind it: the claims set the legal boundary of what is protected, and anything outside them is not. A patent is a right to exclude others rather than a positive right to practise the invention, which matters where an invention builds on rights others already hold.

The USPTO grants three kinds of patent under US law, and they protect different things. Utility patents cover how an invention works: new and useful processes, machines, articles of manufacture, compositions of matter, and improvements to them. Design patents cover the ornamental appearance of an article rather than how it functions. Plant patents broadly cover certain new and distinct plant varieties that have been asexually reproduced; the precise eligibility rules are set by statute and certain categories are handled outside the USPTO (for example through a separate route for some sexually reproduced varieties), so confirm the right route with counsel. Foreign businesses often focus on utility patents, but the design route can be relevant for product appearance and is worth assessing alongside the utility filing.

Who administers patents: the USPTO

Patents in the United States are granted and administered by the USPTO, an agency of the US Department of Commerce. The USPTO receives applications, examines them for compliance with the statutory requirements, grants patents that qualify, and maintains the public record of granted patents and published applications. It operates under federal patent law, so both the substantive standards and the procedural steps trace back to Title 35 and the rules made under it.

To be patentable, an invention generally has to fall within eligible subject matter and meet the core requirements of novelty, non-obviousness, and utility, and the application must describe the invention clearly enough to enable others to make and use it. US subject-matter eligibility, particularly for software and certain biotech inventions, is an area of evolving case law and can be more restrictive than applicants expect, so assess eligibility with counsel early. Examination is conducted in English. Foreign applicants commonly work through a US patent attorney or agent registered to practise before the USPTO, and many find professional representation valuable through the process. Specific USPTO rules can apply to foreign applicants and to inventions made in the US, including foreign-filing-licence requirements, so confirm your representation and filing position with US counsel.

The broad shape of getting a patent

Mechanically, obtaining a US patent follows a recognisable arc. You file an application, the USPTO examines it, the examiner raises objections or rejections in office actions to which you respond, and if the application meets the requirements a patent is granted on payment of the relevant fees. Examination of utility applications is substantive: an examiner searches the prior art and assesses novelty, non-obviousness, subject-matter eligibility, and whether the application adequately describes and enables the invention. The back-and-forth of office actions and responses is a normal part of the process rather than a sign something has gone wrong.

Two features of US practice shape filing strategy from the start. First, the United States is a first-inventor-to-file system following the America Invents Act, so as a general rule rights flow to the first inventor to file rather than to whoever invented first. It is first-inventor-to-file, not pure first-to-file: the applicant must be or derive from the inventor, and derivation provisions and the inventor's own grace-period disclosure mean it is not a simple race to the office. Second, and distinctively, the US retains a grace period: an inventor's own qualifying public disclosure within a defined period before filing does not necessarily destroy US novelty, even though the same disclosure may well bar protection in jurisdictions with no comparable grace period. Relying on the grace period is risky for a business with international ambitions, so the safer default is to file before disclosing anywhere. The length of the grace period (currently one year) and how it is applied are matters of statute and interpretation, so confirm the current position with qualified counsel rather than treating it as a free window.

Provisional applications are a common way to secure an early filing date in the United States. A provisional application is not examined and does not by itself become a granted patent; it establishes a priority date, and a corresponding non-provisional or international application claiming its benefit must be filed within a strict statutory period measured from the provisional filing date. This deadline is generally not extendable, so confirm the exact period with the USPTO or your attorney before relying on it. Used well, a provisional buys time to develop the invention and assess markets while preserving an early date. The full procedure, including provisional and non-provisional filing, priority claims, examination, and responding to office actions, is covered in the how-to guide.

How long protection lasts

Term depends on the type of patent, and the figures are version-specific, so treat any single number as indicative only and confirm the current position with the USPTO or your attorney. As a broad guide, the basis on which each term is calculated (filing date, grant date, or otherwise) and the exact lengths are set by statute and have changed over time. A utility patent generally runs for a term measured from its filing date rather than its grant date, which is why delays in examination can erode the usable life of a patent (and why mechanisms exist that can adjust the term in some cases). Design and plant patents are calculated on their own bases. Across these types the precise lengths, the rules on how the term is calculated, the start point, and any adjustments are set by statute and can change with the date of filing, so verify them directly with the USPTO.

Keeping a granted utility patent in force is not automatic. Maintenance fees fall due at intervals across the life of the patent, and a patent that is not maintained will lapse before its full term. These fees, their amounts, the intervals at which they fall due, and any surcharge or grace arrangements are set by the USPTO and change over time, so diarise them carefully and confirm current requirements through the current USPTO fee schedule or your attorney rather than relying on a fixed figure or a fixed schedule.

Main practical considerations for a foreign business

Several recurring issues catch out otherwise well-prepared foreign applicants, and they are worth flagging at overview level.

File before you disclose. Although the US grace period can rescue an inventor's own earlier disclosure in some circumstances, many major jurisdictions offer no comparable grace period, and those that do apply narrower or different conditions, so a public disclosure before filing can forfeit your rights in many countries. For any business that may want protection beyond the US, filing first and disclosing second is the disciplined default, and you should confirm the position in each target jurisdiction with local counsel.

Use the provisional as a tool, not a crutch. A provisional secures an early date economically, but it only protects what it actually describes, and a thin provisional can leave gaps when the later non-provisional is examined. The value of a provisional depends on how fully it sets out the invention, so it deserves real drafting attention rather than being treated as a placeholder.

Mind the route in and the timelines. Foreign businesses generally reach the United States either by filing directly with the USPTO or by entering the US national phase from an international (PCT) application. The Patent Cooperation Treaty is the WIPO-administered system for seeking patent protection in many countries through a single international application, and it can defer the cost and commitment of national filings while preserving a priority date. A direct US filing keeps the process simple where the US is the main target; a PCT route can be more efficient across a multi-country programme. The deadlines that govern claiming priority and entering the national phase are strict and time-sensitive, so confirm them early. For the wider mechanics, see our overview of the PCT.

Budget for representation and for the long arc. US examination can involve several rounds of office actions over a period of years. Whether to engage a USPTO-registered patent attorney or agent, and how, is a decision to take with qualified counsel; many applicants find professional representation valuable given how much the claims, once granted, depend on careful drafting and prosecution. Build both the cost and the time into your planning rather than assuming a quick grant.

Because the consequences of each of these points are jurisdiction-specific and often turn on facts, the sensible course before filing in the United States is to consult a vetted local firm to pressure-test your filing strategy, your disclosure timing, and the scope of your claims. For the wider US picture, see our United States hub.

This article is general information and not legal advice; IPEnvoy is not a law firm. Official requirements, fees, and processing times are set by the USPTO and change over time; always confirm current details on the USPTO's official channels or through qualified local counsel.