Laches vs. Estoppel: Key Differences and Legal Applications
Laches vs. estoppel: Key differences, legal impact, and how they affect claims in contracts, trademarks, and patent law. 6 min read updated on March 20, 2025
Key Takeaways
- Laches vs. Estoppel: Laches prevents claims due to undue delay, whereas estoppel prevents a party from contradicting prior statements or conduct.
- Types of Estoppel: Includes equitable, collateral, and promissory estoppel, each serving different legal purposes.
- Elements of Laches: Requires knowledge of a claim, unreasonable delay, and resulting prejudice.
- Legal Applications: Laches and estoppel are used in various legal fields, including contract law, insurance, and patent law.
- Patent Law Implications: Laches is no longer a valid defense in patent cases, while equitable estoppel remains a strong defense.
- Defensive Strategies: Understanding these doctrines helps individuals and businesses avoid legal pitfalls related to claims and defenses.
Laches and estoppel refers to the denial of a claim that hasn't been acted on in a timely manner. Called, estoppel by laches, some courts will deny someone the right to make a claim because they took too long or were negligent. Think of a person who is in a car accident but waits a year to file an insurance claim. They may be denied coverage through estoppel by laches.
What Is Estoppel?
Estoppel is a legal term that refers to a person being barred from asserting their rights or their ability to claim or deny a fact, because of their failure to act in a case identical to their current one, their actions, previous statements, admissions, or conduct. Estoppel by laches happens when the person is barred from asserting their rights due to their lack of timeliness. If the person waits until the other party is hindered because of their waiting, they are barred from making a claim against the other party.
Other types of estoppel include:
- Equitable estoppel.
- Collateral estoppel.
- Promissory estoppel.
Equitable Estoppel in Legal Cases
Equitable estoppel prevents a party from asserting a legal claim or defense when their prior conduct, statements, or negligence led another party to act in reliance on those representations. Courts apply equitable estoppel to prevent injustice in various legal contexts, including:
- Contracts: Preventing a party from denying contractual obligations when another party relied on their previous conduct.
- Employment Law: Stopping an employer from denying promised benefits if employees acted based on those assurances.
- Intellectual Property: Used in patent law to prevent a patent holder from enforcing a patent when they previously misled others into believing they would not enforce their rights.
What Is Laches?
Laches is another legal term that means someone is basically out of time. If one party wants to make a legal claim against another party, they need to do so before the other party is limited or prejudiced by the time that has passed. There are a few different elements to the rule of laches:
- Claim knowledge.
- Unreasonable delay in action.
- Negligence.
When any of these elements took place and therefore harmed the opponent's ability to defend themselves or do right by the claim, the doctrine of laches is enforced, and the claim cannot go forward.
Certain types of legal claims will include a statute of limitations that sets forth a specific time period in which claims must be acted on to be valid. Even without a statute of limitations, however, most claims need to be enacted within a reasonable amount of time when they are known about. The best way to avoid running into the doctrine of estoppel by laches is to ask an experienced attorney for help anytime you have a question about a claim.
Laches in Intellectual Property Law
Laches is a significant defense in intellectual property law, particularly in trademark disputes. Courts consider whether a delay in enforcement has caused harm to the alleged infringer. Key considerations include:
- Trademark Law: If a trademark owner delays enforcing their rights while a competitor builds a brand, courts may prevent enforcement due to prejudice.
- Copyright Law: Delayed claims in copyright infringement cases may weaken enforcement if the infringer relied on the inaction.
- Patent Law: The Supreme Court ruled in SCA Hygiene Products v. First Quality Baby Products that laches is not a defense for damages in patent cases, but equitable estoppel remains a viable defense.
Types of Waivers and Estoppel
When signing a waiver, the signee essentially agrees to estoppel on their own. Waivers give up the rights of a party intentionally. This is also called waiver and estoppel. Many companies have lawyers and other professionals who write their contracts for them and who understand these concepts well, but it's also important for the policyholders to understand what they're signing.
Having a thorough understanding of waiver and estoppel and laches and estoppel when entering into a contract with any insurance company could mean the difference between having a claim paid or denied when you need it most.
Here are some of the most common types of waivers that come up in insurance policies:
- Express waiver.
- Implied waiver.
- Waiver by silence.
- Different than waiver.
The Role of Acquiescence in Estoppel
Acquiescence is closely related to estoppel and occurs when a party knowingly fails to assert their rights, leading the other party to believe the rights will not be enforced. Acquiescence is often used in:
- Trademark Disputes: When a trademark holder is aware of an infringing use but does nothing, courts may prevent future enforcement.
- Contract Law: If a party continuously ignores a contract violation, they may lose the ability to enforce that provision.
- Real Estate Law: Failure to object to property encroachments can result in losing the right to demand removal.
Express Waiver
An express waiver might be written in a contract or orally agreed to, but it is a definite statement of giving up a right. If, for example, an insurance company tells their policyholder that they will not lapse their policy due to missed payments, they are expressly waiving their right to lapse the policy under that circumstance.
Estoppel in Insurance Claims
Estoppel plays a critical role in insurance claims, particularly when insurers’ actions imply a waiver of policy provisions. Common scenarios include:
- Claim Acceptance: If an insurer accepts a late claim without objection, they may be estopped from later denying it.
- Policy Changes: If an insurer allows modifications without formal documentation, they may be unable to enforce the original terms.
- Denial of Coverage: An insurer who previously indicated coverage may be prevented from later denying a claim.
Implied Waiver
An implied waiver isn't put down in words or even said aloud but is implied through the actions of the party that waives their rights. For instance, if a policyholder pays their premium after the official due date and the insurance company receives and accepts it, the company is implying the waiving of their right to enforce the due date and lapse the policy as a consequence.
Waiver by Silence
A waiver by silence happens when one party doesn't speak when they should and therefore waives a certain right. If a policyholder notifies their insurance company of a recovery from disability, but the company continues paying benefits for the disability, the company waives its right to stop those payments because they didn't speak when they learned of the change.
Different Than Waiver
A different than waiver comes into play when one party is trying to treat another unfairly or differently from the past. Say an insurance company has always accepted late payments without canceling policies, but they try to cancel a certain policyholder's coverage due to a late payment. The different than waiver rule may be used to get the insurance company to continue coverage because of their past actions toward other policyholders.
Frequently Asked Questions
-
What is the key difference between laches and estoppel?
Laches bars claims due to unreasonable delay that prejudices the other party, while estoppel prevents a party from contradicting their previous actions or statements. -
Can laches be used as a defense in all legal claims?
No, laches is generally not applicable in cases where statutory limitations exist, such as in patent law following the SCA Hygiene ruling. -
How does estoppel apply in contract law?
Estoppel prevents a party from denying their obligations if their past statements or conduct led the other party to rely on those commitments. -
What are common examples of laches in trademark law?
A trademark owner delaying enforcement while another business builds a brand under a similar name may result in laches preventing the owner from later enforcing their rights. -
When should I consult a lawyer regarding laches and estoppel?
You should consult an attorney if facing a legal dispute involving delays in asserting rights, contractual obligations, or intellectual property claims to ensure you understand potential defenses.
If you need help with laches and estoppel, you can post your legal need on UpCounsel's marketplace. UpCounsel accepts only the top 5 percent of lawyers to its site. Lawyers on UpCounsel come from law schools such as Harvard Law and Yale Law and average 14 years of legal experience, including work with or on behalf of companies like Google, Menlo Ventures, and Airbnb.