Finding your way through the patent process

A gardener designs a tool that makes an awkward job easier. Friends say it deserves a patent. That is encouragement, not an answer. Before spending money, the gardener needs four answers. Is the relevant feature new? What has already been described? What would the claims cover? Would that protection help the gardener's plans?

A U.S. patent gives you the right to stop others from making, using, offering for sale, selling or importing the claimed invention. It does not give you the right to make or sell it yourself. 1 So if you improve someone else's patented tool, their patent can still stop you selling your improved version, even if you hold a patent on the improvement. Whether you can get a patent and whether you are free to sell the product are two separate questions. Answer both.

Understand what kind of application you are considering

A utility patent covers a new and useful process, machine, article of manufacture or composition of matter. A design patent covers a new, original and ornamental design for an article of manufacture. 1 Put simply, a utility patent protects how an article works and a design patent protects how it looks. 2 For the gardener, a new grip mechanism is a utility question and the distinctive shape of the handle is a design question. Each needs its own application. A utility patent lasts up to 20 years from the first nonprovisional filing date; a design patent lasts 15 years from grant. 1 If the appearance matters to you, read When the shape of a product matters.

In a utility application, the description must explain the invention in full, clear, concise and exact terms, so that a skilled person can make and use it, and must set out the best way you know to carry it out. The claims define exactly what is protected. The examiner checks that what you claim is patentable subject matter and is new, useful and non-obvious. 6 "Nobody sells this" proves none of that. You generally cannot patent an invention that is already publicly available, and an earlier patent application by another inventor counts against you even if no product was ever made from it. 3

Use searching to learn what is already known

Search before you apply. The USPTO's search strategy has six steps: 8

1. Write down every term that describes your invention, including technical and trade words.
2. Run keyword searches in Patent Public Search.
3. Read the documents you find in depth, not just their titles.
4. Find the Cooperative Patent Classification (CPC) codes those documents use and search by them.
5. Follow the citations, both the older documents a patent cites and the later ones that cite it.
6. Widen the search to foreign patents (for example in Espacenet) and to books, journals, websites, technical catalogs and conference proceedings in the field.

Budget hours to learn the process. 3 Staff at the Patent and Trademark Resource Centers give free training on U.S. patent searching. 8 Treat the results as information about the field, not as clearance. The gardener may find that the whole tool is old but one arrangement of parts solves a known problem in a new way. That arrangement is what the claims should focus on.

Know what a provisional application does

A U.S. provisional application gives you an early effective filing date for a later nonprovisional application. It needs a written description of the invention, any drawings needed to understand it, a cover sheet (Form PTO/SB/16) and the filing fee. It needs no formal claims and no oath or declaration, and it is not examined. You may mark the invention "Patent Pending" while it is pending. You cannot file a provisional for a design. 4

The deadline is fixed: file a nonprovisional application that claims the benefit of the provisional within 12 months of the provisional's filing date. The 12 months cannot be extended, and the provisional is abandoned automatically when they run out. If you miss the date, you have a narrow safety net: file the nonprovisional within 14 months and petition to restore the benefit, stating that the delay was unintentional. Put the 12-month date in your calendar the day you file. 4

The early date covers only what the provisional actually supports. Every claim in the later application must have support in the provisional's description. 4 A thin sketch filed the night before a pitch protects only what the sketch shows. Describe every version and variation you might later claim. If you are about to show the invention to anyone, read Before you show an invention to the world first.

Follow the application beyond submission

Have a registered patent attorney or agent draft or review your claims before you file the nonprovisional application; the claims set the scope of everything that follows, and the USPTO itself recommends using one. 1 Find one through the USPTO's practitioner search. If you file on your own, the USPTO's Pro Se Assistance Program helps independent inventors. 1 If you live outside the U.S., you must be represented by a USPTO-registered practitioner for anything you file on or after July 20, 2026. 1

Then work through the steps in order:

1. Register and file. Register as an eFiler, verify your identity, and file in Patent Center. 3
2. Include every part. A nonprovisional utility application needs a specification (description and claims), drawings when necessary, a signed oath or declaration, and the filing, search and examination fees. Pay the fees when you file to avoid a surcharge; a paper filing costs an extra non-electronic filing fee. 6 Check the current amounts on the USPTO fee schedule and whether you qualify for the small or micro entity discounts available to independent inventors and small businesses. 32
3. Answer the examiner. The examiner reviews the application and sends office actions. Reply in writing before each deadline, and ask for an interview with the examiner when talking would resolve an issue faster. If any claim is rejected twice, you can appeal to the Patent Trial and Appeal Board. 3 You can amend the claims and description, but you cannot add new matter beyond what you originally filed; new material needs a separate application. 6
4. Pay the issue fee. When the examiner allows the application, you receive a Notice of Allowance and Fee(s) Due. Pay within three months of its mailing date. This deadline cannot be extended, and if you miss it the application is abandoned and no patent issues. 3
5. Keep the patent alive. A utility patent needs maintenance fees at 3 to 3.5, 7 to 7.5 and 11 to 11.5 years after it issues. You cannot pay early. Late payment with a surcharge is possible up to 4, 8 and 12 years; after that the patent lapses. Design and plant patents have no maintenance fees. 7

If you appoint an attorney or agent, the USPTO corresponds only with them. 3 Make sure every notice reaches you, and keep it with the application file. "Patent pending" is the start of the work, not the end of it.

Think about countries before the choices narrow

A U.S. patent is effective only in the U.S. and its territories. 1 There is no single worldwide patent: each national or regional office decides whether to grant one. 5 Four rules shape your plan:

• Priority deadline. Under the Paris Convention you have 12 months from your first patent application to file in other member countries and keep the earlier date 5; for designs the window is six months. 1
• One international application. The Patent Cooperation Treaty lets you file a single international patent application covering more than 150 contracting parties, but you still enter the national or regional phase country by country. 5 For designs, the Hague system works the same way through one international design application. 2
• Disclosure before filing. The U.S. gives you one year after your own first public disclosure. Many other countries refuse a patent if the public disclosure came before the filing date. If you want patents abroad, file before you show the invention. 5
• Foreign filing license. If the invention was made in the U.S., get USPTO authorization before you file abroad. Filing without it can cost you your patent rights and bring a fine or imprisonment. 5

The gardener does not need patents everywhere. Pick the countries where protection supports a real market, a manufacturing arrangement or a licensing deal, and decide before the 12-month window closes. For why one filing does not cover the world, read Does your protection travel across borders.

Three outcomes are all good results of working through this process: a well-supported application, a decision to keep the know-how secret (see Keeping valuable know-how a secret), or a decision that patent costs do not fit the project. Each beats filing simply because an invention feels valuable.