U.S. patent law recognizes three types of patents that the U.S. Patent and Trademark Office actually grants: utility, design, and plant. A fourth item people group with them, the provisional patent application, is not a granted patent at all but a placeholder filing that reserves an early filing date for a later utility or plant application. Each protects something different, lasts a different length of time, and costs a different amount to keep alive.
Utility Patents
Utility patents are the most common kind and protect how an invention works. Federal law lets anyone who invents a new and useful process, machine, manufactured item, or composition of matter apply for one.1Office of the Law Revision Counsel. 35 USC 101 – Inventions Patentable A pharmaceutical compound, a manufacturing method, a software algorithm tied to a specific technical improvement, and a mechanical engine design can all qualify.
To earn one, the invention has to clear three hurdles. It must be novel, meaning no one has publicly disclosed or patented the same thing before. It must be non-obvious, meaning someone with ordinary skill in the relevant field would not consider it an apparent next step given what already exists.2Office of the Law Revision Counsel. 35 USC 103 – Conditions for Patentability, Non-Obvious Subject Matter And it must be useful, meaning it serves a practical purpose and actually works.
A utility patent lasts 20 years from the earliest filing date of the application, not from the date the patent is granted.3Office of the Law Revision Counsel. 35 USC 154 – Contents and Term of Patent, Provisional Rights Because examination often takes over two years, the effective period of enforceable protection is shorter than the full 20. Keeping the patent alive also requires paying maintenance fees at 3.5, 7.5, and 11.5 years after issue. Miss a payment and a six-month grace period with a surcharge is available, but miss that window too and the patent expires permanently.4Office of the Law Revision Counsel. 35 USC 41 – Patent Fees, Patent and Trademark Search Systems
What Cannot Be Patented
Not everything useful qualifies. Courts have carved out three categories of subject matter that fall outside patent eligibility even if they seem inventive: abstract ideas (including pure mathematical formulas, fundamental business methods, and processes that happen entirely in someone’s head), laws of nature (like a newly observed correlation between a drug and a biological reaction), and natural phenomena (including naturally occurring DNA sequences and unmodified organisms).5United States Patent and Trademark Office. Patent Subject Matter Eligibility An invention that applies an abstract idea or law of nature to a specific, practical technological problem can still be patentable. The line is whether the patent would effectively claim ownership of the underlying principle itself.
Why Claims Matter
The most important part of a utility patent application is the claims section. Claims define exactly what the patent protects and what you can enforce against competitors. Broad, well-drafted claims cover more ground; narrow claims leave room for others to design around the invention. Every non-provisional utility application must include at least one claim, and getting the claims right is where patent attorney fees tend to concentrate. Poorly drafted claims are the most common reason patents fail to provide meaningful protection, even when the underlying invention is genuinely novel.
Design Patents
Design patents protect how a manufactured item looks rather than how it works. If you have created a new, original, and ornamental appearance for a product, a design patent prevents others from copying that visual design.6Office of the Law Revision Counsel. 35 USC 171 – Patents for Designs Think of the distinctive shape of a smartphone, the tread pattern on an athletic shoe, or the contour of a piece of furniture. The key word is “ornamental.” If the shape is driven entirely by how the item functions rather than aesthetic choice, a design patent will not hold up.
Design patents filed on or after May 13, 2015 last 15 years from the date the patent is granted.7United States Patent and Trademark Office. 1505 – Term of Design Patent The grant date matters because, unlike utility patents measured from the filing date, the design patent clock does not start until the USPTO issues the patent. Design patents require no maintenance fees at any point.4Office of the Law Revision Counsel. 35 USC 41 – Patent Fees, Patent and Trademark Search Systems Once granted, the patent stays in force for the full 15 years without any further payments.
Plant Patents
Plant patents protect new and distinct plant varieties that have been reproduced asexually, through methods like grafting, budding, or cuttings rather than from seeds. The plant must have been invented or discovered in a cultivated setting; a wild plant found in nature does not qualify.8Office of the Law Revision Counsel. 35 USC 161 – Patents for Plants Examples include a newly bred rose variety or a unique fruit tree propagated through grafting.
Like utility patents, plant patents last 20 years from the earliest filing date.3Office of the Law Revision Counsel. 35 USC 154 – Contents and Term of Patent, Provisional Rights Like design patents, they require no maintenance fees.4Office of the Law Revision Counsel. 35 USC 41 – Patent Fees, Patent and Trademark Search Systems
Plant Patents Versus Plant Variety Protection
Plant patents are sometimes confused with Plant Variety Protection (PVP) certificates, which are issued by the U.S. Department of Agriculture rather than the USPTO. The difference is what each covers. Plant patents under federal patent law require asexual reproduction. PVP certificates cover seeds, tubers, and asexually reproduced plants alike, and last 20 years for most crops and 25 years for vines and trees.9Agricultural Marketing Service. Plant Variety Protection If your new variety is seed-reproduced, PVP is your path because the patent system will not cover it.
Provisional Patent Applications
A provisional application is not a patent. It is not examined, it grants no enforceable rights, and it will never turn into a patent on its own. What it does is establish an official filing date with the USPTO, giving you a 12-month window to decide whether to pursue a full non-provisional application.10Office of the Law Revision Counsel. 35 USC 111 – Application During that window, you can use the phrase “patent pending” on your product.
The reason provisional applications get so much attention is cost. Filing one costs $325 for a standard filer, $130 for a small entity, and just $65 for a micro entity under the current 2026 fee schedule.11USPTO – United States Patent and Trademark Office. USPTO Fee Schedule That buys time to test the market, seek investors, or refine the invention before committing to the much larger expense of a full application. A provisional also does not require formal patent claims, which makes it simpler to prepare.
The catch is that the 12-month deadline is absolute. If you do not file a non-provisional application claiming the benefit of your provisional within that year, the provisional is treated as abandoned and cannot be revived.10Office of the Law Revision Counsel. 35 USC 111 – Application You lose the early filing date, and if you have publicly disclosed the invention in the meantime, you may also have triggered the one-year statutory bar that could block a patent altogether.
The One-Year Public Disclosure Trap
Federal patent law bars you from patenting an invention that was already described in a publication, in public use, or on sale more than one year before your effective filing date. If the disclosure came from you, you have a one-year grace period to file. Once that year expires, no application can save you. For provisional filers this matters enormously: publicly showcase your invention while relying on a provisional, then let the provisional lapse without filing a non-provisional, and you may find the grace period has run out and the invention is no longer patentable.
Choosing the Right Type
The right patent depends on what you are trying to protect. If your invention is a new device, chemical process, or software method, you want a utility patent. If you have designed a distinctive look for a product but the underlying technology is not new, a design patent is the better fit. Some products warrant both. A uniquely shaped consumer gadget with novel internal technology could receive a utility patent for how it works and a design patent for how it looks.
Plant patents serve a narrow audience of breeders and horticulturalists working with asexually reproduced varieties. Seed-reproduced varieties fall outside the patent system entirely and belong on the PVP track. Provisional applications are a strategic tool for any inventor who needs more time or wants to test the market before committing to the full patent process, though the hard 12-month conversion deadline means they require planning from day one.
What Each Type Costs to File
USPTO fees are only part of the picture, but they set the floor. The figures below are the combined filing, search, and examination fees under the current 2026 schedule:12USPTO.gov. USPTO Fee Schedule – Current
- Utility patent: $2,000 standard, $800 small entity, $400 micro entity
- Design patent: $1,300 standard, $520 small entity, $260 micro entity
- Plant patent: $1,450 standard, $580 small entity, $290 micro entity
- Provisional application: $325 standard, $130 small entity, $65 micro entity (filing fee only; no search or examination)
Small entities (companies with fewer than 500 employees, independent inventors, and nonprofits) pay 40% of the standard fee, a 60% discount. Micro entities, which include applicants who meet income limits and have filed fewer than four previous patent applications, pay 20% of the standard fee, an 80% discount.12USPTO.gov. USPTO Fee Schedule – Current The discounts apply to nearly every USPTO patent fee, including maintenance fees.
On top of USPTO fees, most applicants hire a patent attorney or agent. Attorney fees for preparing and filing a utility patent application typically range from $2,500 to over $20,000, depending on the invention’s complexity. Design and plant patents generally cost less because the applications are simpler. Professional fees often dwarf the government filing fees.