A high percentage of patent applications receive an initial rejection from the USPTO because the examiner finds prior art that appears too close to the invention. Prior art is a key concept for any inventor to understand before moving forward with a patent application. The stronger your grasp of it, the easier it is to avoid surprises later in the process.
If you’re new to the patent process, you may also find this guide helpful: Getting Started with Patents: A Guide for First-Time Filers.
What Is Prior Art (and What Isn’t)?
Prior art is any information that was already available to the public before you filed your patent application. It can come from many places: articles, websites, earlier patent applications, issued patents, public use, product sales, trade show displays, and more. If it existed and was accessible to the public, it can count against your application.
Just as important is understanding what does not qualify as prior art. Confidential information, internal research, NDA-protected discussions, and private work inside a company are not considered prior art. Again, what matters is public availability. If someone else has already made a similar idea public anywhere in the world, it can count against your application even if you developed your invention independently.
U.S. law does allow limited exceptions, such as a one-year grace period for an inventor’s own public disclosure and certain joint-inventor disclosures. These rules are narrow and easy to misunderstand, so they should not be treated as a strategy. Consider them rare safeguards, not planning tools.
Why Prior Art Matters During Patent Examination
Patent examiners use prior art to determine whether your invention is new and not obvious. Even something obscure or published years ago can undermine your application if it is close enough to what you created. This is why many first-time applicants are surprised when an examiner cites a patent or publication they had no idea existed. It only takes one solid reference to derail a filing.
Why Basic Searching Falls Short
Most inventors start their search for prior art with Google, which only captures a small portion of what examiners rely on. A complete search must include earlier-filed applications that have not yet published, foreign patent databases, technical publications, and other specialized sources.
A reliable search requires experience, context, and familiarity with how examiners interpret references. Attorneys and patent professionals know how to uncover relevant material and how to interpret it. If your goal is to file with confidence, you need this level of review from the start. Waiting until after you find something similar, or after the USPTO raises an issue, is too late.
What Happens After a Thorough Search
Once your search is complete, a patent attorney can help you understand how close the prior art actually is. Small differences may be enough to support a patent, but only if they are identified and framed correctly in your application. An attorney can help refine your idea if needed and suggest realistic filing strategies based on the results of the search.
Starting with this information early saves time and prevents costly rework.
Don’t take chances – contact Larson & Larson to speak with legal experts who can evaluate all the prior art related to your invention and advise how to move forward strategically.
Published by Larson & Larson, a Florida-based intellectual property law firm protecting innovation since 1987.
