How Long Does a Patent Last in the United States?

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When you invent or discover something new, patents offer protection to prevent competitors from stealing or profiting from your intellectual invention without authorization. However, this protection does not last forever. It’s important to be aware of how long a patent can last to ensure that you understand your legal rights and options. Continue reading and work with a skilled Essex County, New Jersey intellectual property lawyer for more information today.

What is a Patent?

A patent is a legal right granted by the federal government that gives an inventor the exclusive right to make, use, sell, or import an invention for a limited period of time. It is crucial to understand that patents protect actual inventions, not abstract ideas alone.

To qualify for this protection, an idea must generally be new, useful, and non-obvious to an ordinary person skilled in the relevant field. Simply having a good idea is not enough; it must be developed into a tangible creation or process that meets these requirements.

Patentable inventions cover a wide range of creations and improvements. Examples include:

  • Machines
  • Manufacturing processes
  • Medical devices
  • Software-related inventions
  • Chemical formulas
  • Consumer products.

Patents are governed primarily by federal law in the United States, specifically under the Patent Act.

How Long Does a Patent Last in the U.S.?

In the U.S., the duration of patent protection depends on the type of patent granted. Most patents are utility patents, which protect functional inventions, machines, processes, and technologies. These typically last for 20 years from the date the patent application was filed.

However, simply being granted a utility patent is not enough to maintain protection for the full term. Maintenance fees must usually be paid periodically to the U.S. Patent and Trademark Office (USPTO). Failure to pay these required fees can cause the patent to expire early, potentially cutting the 20-year period short.

Other types of patents have different terms. Design patents, which protect the appearance or ornamental design, generally last for 15 years from the date they are issued for applications filed on or after May 13, 2015. Plant patents, which protect certain newly invented or discovered asexually reproduced plant varieties, generally last for 20 years from the filing date.

What Happens When a Patent Expires?

When a patent expires, the invention generally enters the public domain. This means that competitors can legally manufacture, use, sell, and market the invention. This increased availability often drives market competition and lowers prices.

Typically, expired patents cannot be enforced, and the patent holder loses all exclusive rights after expiration. However, exceptions may apply, such as protections maintained through existing licensing agreements, separate trademark protections, or trade secret protections.

Patent expiration is an important event, especially for industries like pharmaceuticals, technology, and manufacturing. Companies actively monitor these expiration dates to strategically develop competing products, enter profitable markets, and reduce legal risks associated with infringement.