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Your Naperville Intellectual Property Attorney
If you are trying to protect an invention, a brand, or a creative work in Naperville, or you have been accused of infringing someone else’s, you probably want plain answers about deadlines, courts, and what each kind of protection covers. Federal statutes set most of them, so many answers can be checked. This page covers the deadlines, the definitions that decide whether something is protected, the federal district court for DuPage and Will counties, and the Illinois rules that sit next to the federal ones. An attorney who handles intellectual property matters can tell you which of these rules apply to your situation.
Intellectual Property Rules at a Glance
- A patent case is a federal case. The district courts have original jurisdiction of any civil action arising under an Act of Congress relating to patents (28 U.S.C. 1338(a)), and infringement damages are limited to the six years before the complaint (35 U.S.C. 286).
- Infringing a registered mark means using a reproduction, counterfeit, copy, or colorable imitation in a way likely to cause confusion (15 U.S.C. 1114(1)(a)).
- How long does a copyright last? For works created on or after January 1, 1978, the life of the author plus 70 years (17 U.S.C. 302(a)), with different counts for joint works and works made for hire.
- What is a trade secret? Information the owner has taken reasonable measures to keep secret and that derives independent economic value from not being generally known (18 U.S.C. 1839(3)).
- Where is my case filed? Naperville is in the Northern District of Illinois, and that court holds court in Chicago, Wheaton, Freeport, and Rockford (28 U.S.C. 93).
Patents, Trademarks, Copyrights, and Trade Secrets Compared
If you have made something new and useful, such as a device, a process, a manufactured article, or a composition, a patent is the tool the statute provides (35 U.S.C. 101). The grant runs from issuance to 20 years after the application was filed (35 U.S.C. 154(a)(2)).
A brand is protected as a trademark when it functions to identify and distinguish goods from those of others and to indicate the source of the goods (15 U.S.C. 1127). The same statute defines a service mark for the source of services.
For creative work, copyright arises in original works of authorship fixed in a tangible medium of expression (17 U.S.C. 102(a)). The limit in 17 U.S.C. 102(b) means the underlying idea or method is not protected even when the way it is expressed is.
Business and technical information such as plans, formulas, and processes qualifies as a trade secret only if the owner has taken reasonable measures to keep it secret and it derives independent economic value from secrecy (18 U.S.C. 1839(3)).
Time Limits That Matter in Patent, Copyright, and Trade Secret Cases
For copyright infringement, the statute sets three years from when the claim accrued (17 U.S.C. 507(b)), and registration or a refusal of registration must come before suit on a United States work (17 U.S.C. 411(a)).
Trade secret claims under federal law must be filed within three years of discovery, or of when reasonable diligence would have revealed the misappropriation, and continuing misappropriation is one claim (18 U.S.C. 1836(d)).
Six years is the number to know in patent cases: infringement more than six years before the complaint cannot be recovered on (35 U.S.C. 286).
Do not assume that a state-law claim follows the federal deadlines. Illinois’s limitation periods and the point when a claim accrues are matters of Illinois statutes and case law, and an attorney can check the dates for your particular claim.
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What to Do Before a Dispute Starts
Federal trademark registration is available both to owners of a mark already used in commerce (15 U.S.C. 1051(a)(1)) and to a person with a bona fide intention, in good faith, to use a mark in commerce (15 U.S.C. 1051(b)(1)), through an application and a verified statement filed with the Patent and Trademark Office.
A Illinois business can ask an attorney whether a state-level trademark filing with the Illinois Secretary of State is worth adding to a federal application. The provisions are in the Trademark Registration and Protection Act, 765 ILCS 1036, and the two registrations are separate.
Owners of creative work should know that registration is a precondition to suing on a United States work (17 U.S.C. 411(a)), and that the duration for most later works is the life of the author plus 70 years (17 U.S.C. 302(a)).
Inventors should keep the 20-year term measured from filing in mind (35 U.S.C. 154(a)(2)), and should confirm early with an attorney that the invention falls within 35 U.S.C. 101.
Federal District Courts and Where They Sit
In practice, patent and copyright disputes are filed in federal district court (28 U.S.C. 1338(a)), federal trade secret claims start there as well (18 U.S.C. 1836(c)), and a trademark dispute can be filed in federal or state court.
By statute the state has three federal districts, known as the Northern, Central, and Southern Districts of Illinois (28 U.S.C. 93). A federal case from Naperville is filed in the Northern District of Illinois, where court is held at Chicago, Wheaton, Freeport, and Rockford. Because Naperville lies in more than one county, it is worth confirming which county the matter falls in.
Trade Secrets and Trademarks Under Illinois Law
Illinois has a trade secret statute of its own, the Illinois Trade Secrets Act (765 ILCS 1065/1 and following sections). A trade secret dispute from Naperville can involve that statute, and the federal Defend Trade Secrets Act adds a civil action in federal court for a trade secret related to a product or service used in interstate or foreign commerce (18 U.S.C. 1836(b)(1), (c)).
A brand owner in Naperville may have state-law options in addition to federal ones. Illinois’s trademark registration provisions are found in the Trademark Registration and Protection Act, 765 ILCS 1036, and the filing office is the Illinois Secretary of State.
Choosing between state and federal claims, or bringing both, is something an attorney should decide after reviewing what happened and what proof exists.
Common Intellectual Property Claims
Patent Claims and Defenses
The basic patent infringement rule is in 35 U.S.C. 271(a): without authority, making, using, offering to sell, or selling a patented invention in the United States, or importing one, during the patent term.
A patent case is filed in federal district court (28 U.S.C. 1338(a)).
Trademark Infringement and Brand Disputes
Infringement of a registered mark means using in commerce a reproduction, counterfeit, copy, or colorable imitation of the mark in connection with the sale, offering for sale, distribution, or advertising of goods or services where the use is likely to cause confusion, mistake, or deception (15 U.S.C. 1114(1)(a)).
Trademark claims may be filed in federal court or in state court (28 U.S.C. 1338(a)).
Copyright Claims
A copyright claim starts with an original work of authorship fixed in a tangible medium (17 U.S.C. 102(a)), and it is limited to expression: the idea, procedure, process, system, or method of operation is not protected (17 U.S.C. 102(b)).
Federal district courts have original jurisdiction over copyright claims (28 U.S.C. 1338(a)).
Confidential Information and Departing Employees
The Defend Trade Secrets Act lets the owner of a misappropriated trade secret sue when the secret relates to a product or service in interstate or foreign commerce (18 U.S.C. 1836(b)(1)). Whether the information qualifies depends on the definition in 18 U.S.C. 1839(3).
The federal action has a three-year deadline running from discovery, or from when reasonable diligence should have led to discovery (18 U.S.C. 1836(d)).
Injunctions and Money Damages by Type of Claim
Relief in a patent case can include damages of at least a reasonable royalty with interest and costs, and enhancement up to three times in the court’s discretion (35 U.S.C. 284), and an injunction on reasonable terms under the principles of equity (35 U.S.C. 283).
A brand owner who establishes a violation may recover the defendant’s profits, damages sustained, and costs (15 U.S.C. 1117(a)), and can ask the court for an injunction to stop the violation (15 U.S.C. 1116(a)), both subject to the principles of equity.
A copyright owner can choose between actual damages plus the infringer’s profits attributable to the infringement, and statutory damages (17 U.S.C. 504(a), (b)), and statutory damages range from $750 to $30,000 per work as the court considers just (17 U.S.C. 504(c)(1)).
Under 17 U.S.C. 412, an owner who registers after an infringement has started may lose access to statutory damages and attorney’s fees for that infringement, unless the work was published and registered within three months of first publication.
For a misappropriated trade secret, 18 U.S.C. 1836(b)(3) authorizes an injunction against actual or threatened misappropriation, damages for actual loss and unjust enrichment or a reasonable royalty, exemplary damages up to 2 times for willful and malicious misappropriation, and reasonable attorney’s fees to the prevailing party in stated situations.
Have questions about a patent, trademark, copyright, or trade secret? Connect with an attorney.
Getting Your Records in Order
Bring a simple chronology. When was the work created, when was it first shared or sold, and when did you first notice the copying or use? Many of the deadlines on this page run from those events.
Useful patent records include sketches, notebooks, prototypes, and application numbers. Useful trademark records include the logo or name, packaging or signage showing use, and state or federal registration papers.
Creators should bring the work itself, dated drafts, and examples of the copy. Owners of confidential information should bring a description of it, a list of who had access, and the steps taken to keep it secret.
Intellectual Property Matters in Naperville and DuPage and Will counties
Naperville matters that reach federal court are heard in the Northern District of Illinois. Knowing which court you will be in matters because deadlines such as the three-year copyright and trade secret limits run regardless of the court.
People searching outside Naperville can use the Illinois intellectual property listings to find their own city. Related city pages in this region: Bolingbrook, Aurora, and Downers Grove. If the matter involves a crash, a fall, or another injury, our Naperville personal injury attorney page is the better fit.
Frequently Asked Questions
How long does a patent last?
A patent lasts 20 years from the date the application was filed in the United States (35 U.S.C. 154(a)(2)), so the filing date, not the issue date, sets the end of the term.
What is the difference between federal and Illinois trademark registration?
Federal registration is on the principal register through the Patent and Trademark Office (15 U.S.C. 1051). Illinois registration is a separate filing made with the Illinois Secretary of State under the Trademark Registration and Protection Act, 765 ILCS 1036, and it does not replace the federal one.
Which court hears a copyright case from Naperville?
The federal district courts have original jurisdiction over copyright claims (28 U.S.C. 1338(a)). For Naperville, that is the Northern District of Illinois.
Can I sue in federal court over a stolen trade secret?
Yes, if the trade secret is related to a product or service used in, or intended for use in, interstate or foreign commerce (18 U.S.C. 1836(b)(1)). The federal district courts have original jurisdiction of these actions (18 U.S.C. 1836(c)).
Do I have to file in federal court?
For patents and copyrights, yes: the federal jurisdiction is exclusive (28 U.S.C. 1338(a)). Trademark claims may also be brought in state court, and a federal trade secret action is filed in federal district court (18 U.S.C. 1836(c)).
Can a trademark claim be brought under Illinois law?
Possibly. Illinois law may provide trademark claims of its own alongside the federal ones, and which apply depends on the mark and the facts. An attorney can explain the options.
Do deadlines differ for different kinds of intellectual property?
Yes. Copyright and federal trade secret claims each have a three-year period, measured differently (17 U.S.C. 507(b); 18 U.S.C. 1836(d)), and patent damages are limited to six years before the complaint (35 U.S.C. 286).
How do I know whether I need a patent, trademark, copyright, or trade secret protection?
It depends on what you are protecting: an invention (35 U.S.C. 101), a name or logo that identifies goods or services (15 U.S.C. 1127), original creative work (17 U.S.C. 102(a)), or confidential information (18 U.S.C. 1839(3)).
Get Started With an Attorney in Naperville
An intellectual property matter is easier to handle with someone reading the documents alongside you. Submit the form to be connected with an attorney who can go over your work, the deadlines, and the court for DuPage and Will counties.

