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Your Oak Brook Intellectual Property Attorney
Intellectual property law splits into four main areas, patents, trademarks, copyrights, and trade secrets, and each has its own rules on where a case is filed and how long you have. The sections below explain those rules for a matter arising in Oak Brook. The sections that follow cover what patents, trademarks, copyrights, and trade secrets protect, the filing deadlines, registration, the federal courts for DuPage County, Illinois’s own trademark and trade secret rules, and what an infringement claim involves. The facts of your situation decide which area of law controls, and an attorney who practices in federal court can sort that out quickly.
The Short Answers: Deadlines, Courts, and Protection
- Patents belong in federal court. Federal district courts have original jurisdiction over patent claims (28 U.S.C. 1338(a)), and damages cannot reach back more than six years before the complaint (35 U.S.C. 286).
- Trademarks can be registered federally and in Illinois. The federal register is set up by 15 U.S.C. 1051, and state registration is filed with the Illinois Secretary of State under the Trademark Registration and Protection Act, 765 ILCS 1036.
- Copyright lawsuits have a three-year clock from when the claim accrued (17 U.S.C. 507(b)), and a United States work must be registered before an infringement suit can be filed (17 U.S.C. 411(a)).
- Illinois has its own trade secret statute, the Illinois Trade Secrets Act (765 ILCS 1065/1 and following sections), and the federal action in 18 U.S.C. 1836 sits alongside it.
- Federal district: for DuPage County, the Northern District of Illinois under 28 U.S.C. 93, holding court in Chicago, Wheaton, Freeport, and Rockford.
The Four Main Areas of Intellectual Property Law
Patents cover new and useful processes, machines, manufactures, and compositions of matter (35 U.S.C. 101). Protection lasts until 20 years after the date on which the application was filed in the United States (35 U.S.C. 154(a)(2)), so the filing date matters more than the date the patent issues.
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.
A copyright question begins with whether the work is an original work of authorship fixed in a tangible medium (17 U.S.C. 102(a)) and whether what was copied was expression rather than an idea, system, or method (17 U.S.C. 102(b)).
If the valuable thing is confidential know-how, the question is trade secret. Both elements in 18 U.S.C. 1839(3) must be present: reasonable measures to keep the information secret, and independent economic value from its not being generally known.
Deadlines for Intellectual Property Claims
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 secrets: a federal action under the Defend Trade Secrets Act may not be commenced later than 3 years after the misappropriation is discovered or, with reasonable diligence, should have been discovered, and a continuing misappropriation counts as a single claim (18 U.S.C. 1836(d)).
Patent infringement damages reach back at most six years before the complaint (35 U.S.C. 286), so a suspected infringement is worth reviewing promptly.
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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Steps That Strengthen a Claim Before It Is Needed
For a trademark, the owner of a mark used in commerce may request registration on the principal register by paying the prescribed fee and filing an application and a verified statement with the Patent and Trademark Office (15 U.S.C. 1051(a)(1)). A person with a bona fide intention to use a mark in commerce may also apply (15 U.S.C. 1051(b)(1)).
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.
A copyright owner cannot file an infringement action on a United States work before registration has been made (17 U.S.C. 411(a)), although a refusal of registration can also open the door to suit if the Register of Copyrights is notified and served with the complaint.
For an invention, the patent term of 20 years runs from the date the application was filed (35 U.S.C. 154(a)(2)), so the timing of an application is worth discussing with a patent attorney.
The Federal Court for DuPage County
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.
Under 28 U.S.C. 93, Illinois’s counties are grouped into three federal districts. For DuPage County, the court is the Northern District of Illinois, and it holds court in Chicago, Wheaton, Freeport, and Rockford.
What Illinois Law Can Add to Federal Protection
The federal civil action for trade secrets (18 U.S.C. 1836(b)(1)) is filed in federal district court (18 U.S.C. 1836(c)), and a dispute from Oak Brook may also raise a claim under the Illinois Trade Secrets Act (765 ILCS 1065/1 and following sections). Which claims fit depends on the facts.
Beyond the federal Lanham Act, a brand owner in Oak Brook can look to Illinois’s own trademark registration system. Filings are made with the Illinois Secretary of State under the Trademark Registration and Protection Act, 765 ILCS 1036, and a state filing does not replace a federal application.
A lawyer can compare the federal and state routes for your situation and explain the tradeoffs.
The Claims Behind Most Intellectual Property Disputes
Using an Invention Without Permission
Infringement occurs when someone, without authority, makes, uses, offers to sell, or sells any patented invention within the United States, or imports a patented invention into the United States, during the term of the patent (35 U.S.C. 271(a)).
A patent case is filed in federal district court (28 U.S.C. 1338(a)).
Disputes Over Names, Logos, and Brands
Two federal provisions do most of the work in trademark cases: 15 U.S.C. 1114(1)(a) for registered marks and 15 U.S.C. 1125(a)(1) for misleading uses of any word, term, name, symbol, or device, registered or not.
A person who believes he or she is or is likely to be damaged can bring the civil action under 15 U.S.C. 1125(a)(1).
Protecting Creative Work
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)).
The duration of a copyright for a work created on or after January 1, 1978 is generally the life of the author plus 70 years (17 U.S.C. 302(a)).
Confidential Information and Departing Employees
A federal trade secret claim requires a trade secret related to a product or service used in, or intended for use in, interstate or foreign commerce (18 U.S.C. 1836(b)(1)), and the information must meet the definition of a trade secret in 18 U.S.C. 1839(3): reasonable secrecy measures and independent economic value.
The Illinois Trade Secrets Act (765 ILCS 1065/1 and following sections) may provide state-law claims alongside the federal action, with their own deadlines.
What a Successful Claim Can Recover
The patent statute provides for damages adequate to compensate for the infringement, not less than a reasonable royalty (35 U.S.C. 284), and for injunctions to prevent the violation of a patent right (35 U.S.C. 283).
In trademark cases, courts have the power to enjoin violations (15 U.S.C. 1116(a)), and a plaintiff who establishes a violation may recover profits, damages, and costs, subject to sections 1111 and 1114 and the principles of equity (15 U.S.C. 1117(a)).
The copyright statute offers two routes to money relief: actual damages and profits (17 U.S.C. 504(b)) or statutory damages of not less than $750 or more than $30,000 for infringements of any one work (17 U.S.C. 504(c)(1)).
Delay in registering can cost more than time. Infringement that starts before the effective date of registration generally cannot support statutory damages or attorney’s fees, with the exception in 17 U.S.C. 412 for registration within three months after first publication.
Trade secrets: under the federal statute a court may grant an injunction to prevent actual or threatened misappropriation, award damages for actual loss and for unjust enrichment, or impose liability for a reasonable royalty, and if the misappropriation was willful and malicious, award exemplary damages of not more than 2 times the damages awarded, and attorney’s fees in stated circumstances (18 U.S.C. 1836(b)(3)).
Protecting an idea, brand, or creative work in Oak Brook? Talk to an attorney about your deadlines.
What an Attorney Will Want to See
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.
For copyright, gather the work, drafts with dates, and examples of copying. For a trade secret, gather what the information is, who could see it, and what confidentiality agreements or security measures applied.
Local Court Details for Oak Brook
A matter from Oak Brook belongs to DuPage County and, when it is a federal case, to the Northern District of Illinois. Local practice, such as how quickly cases are scheduled and how disputes are handled, shapes how the general rules on this page play out.
If the matter involves a crash, a fall, or another injury, our Oak Brook personal injury attorney page is the better fit. We connect people in Downers Grove, Wheaton, and Cicero with local attorneys as well. People searching outside Oak Brook can use the Illinois intellectual property listings to find their own city.
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.
Can I register my business name or logo as a trademark?
A word, name, symbol, or device used to identify and distinguish goods and indicate their source is a trademark (15 U.S.C. 1127), and the owner of a mark used in commerce may request federal registration (15 U.S.C. 1051(a)(1)).
Can I copyright an idea?
No. Copyright never extends to any idea, procedure, process, system, method of operation, concept, principle, or discovery (17 U.S.C. 102(b)). It protects the original expression of an idea.
How long do I have to bring a trade secret claim under federal law?
Three years after the misappropriation is discovered or, by the exercise of reasonable diligence, should have been discovered, and a continuing misappropriation counts as a single claim (18 U.S.C. 1836(d)).
Which court handles patent and copyright cases from Oak Brook?
Both belong exclusively in federal district court (28 U.S.C. 1338(a)), which for Oak Brook means the Northern District of Illinois.
Do federal deadlines apply to Illinois state-law claims?
Not automatically. Illinois state-law claims have their own limitation periods and accrual rules, set by Illinois statutes and court decisions, and an attorney should check them.
How long do I have to bring a copyright claim?
Three years after the claim accrued (17 U.S.C. 507(b)), and registration must come before suit on a United States work (17 U.S.C. 411(a)).
How do I keep information as a trade secret?
Take reasonable measures to keep it secret, because that is one of the two elements of the definition (18 U.S.C. 1839(3)), and consult an attorney about what measures are reasonable for your business.
Take the Next Step in Your Oak Brook Intellectual Property Matter
You do not have to work out the dates and rules alone. Fill out the form, and you will be connected with an attorney who can review your situation, the deadlines, and what a claim or filing may involve.

