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Is a fire extinguisher patented?

Short answer: specific designs of a fire extinguisher have been patented many times, but "a fire extinguisher" as a general idea is not what is protected. What matters is the exact combination of features in your version.

What our index shows
  • 1,372 US and WO patent publications since 2000 have a title matching “fire extinguish” or a close variant (our index of 9.7 million patent families; one publication per family).
  • Among the 1095 best keyword matches we examined, 515 were published in 2020 or later, and the earliest was published in 2000.
  • Most frequent assignees in those matches: HUBEI JIANDUN FIRE TECH CO LTD (50), SAMSUNG SDI CO LTD (21), SHAANXI J & R FIRE FIGHTING CO (21), KIDDE TECH INC (20).
  • Most common patent classes (CPC subclasses): A62C (937), A62D (196), Y02E (70), H01M (64).

Counts come from keyword matching on titles and abstracts, so they are indicative, not a legal count. Some matches are different products that share a word.

14 real patent publications related to a fire extinguisher

  1. Nozzle and valve assembly for a fire extinguisher US-11951342-B2 2024 · CARRIER CORP
    A valve body and nozzle assembly for a fire extinguisher includes a valve body that includes a nozzle connection that has a valve body threaded portion. A non-metallic nozzle includes a proximal end that has a valve body connectio…
    View on Google Patents
  2. Fire extinguisher valve for a fire extinguishing system, fire extinguishing system comprising such fire extinguisher valve, and method of operating a fire extinguisher valve US-2024149090-A1 2024 · KIDDE DEUGRA BRANDSCHUTZSYSTEME GMBH
    A fire extinguisher valve for controlling a flow of a fire extinguishing agent in a fire extinguishing system comprises a valve body; a manual lever, which is manually movable between an open position, in which a fire extinguishin…
    View on Google Patents
  3. Clean agent fire extinguisher with mixing orifice WO-2024231842-A1 2024 · TYCO FIRE PRODUCTS LP
    A fire suppression device includes a tank storing a fire suppressant agent and a compressed gas. A valve is fluidly coupled to a syphon tube in the tank and can open and release the fire suppressant agent. The syphon tube includes…
    View on Google Patents
  4. Coupler for fire extinguisher nozzle accessory US-11988313-B2 2024 · RUSOH INC
    A push-to-connect and quick-release coupler can be provided. In an example, the coupler can be used with or coupled to a fire extinguisher nozzle. The coupler can include a socket body and an automatic locking assembly. In an exam…
    View on Google Patents
  5. Combination manifold and detergent holding reservoir for communicating with a fire extinguisher nozzle US-9220933-B2 2015 · BONGIORNO JR BENEDICT
    An assembly for mixing and metering a foaming agent with a pressurized fluid output of a fire extinguisher, the extinguisher including a body with a trigger for issuing the fluid through an outlet. The assembly includes a manifold…
    View on Google Patents
  6. Extinguishing agent for metal fires and fire extinguisher WO-2015091917-A1 2015 · CONTINENTAL TEVES AG & CO OHG
    The aim of the invention is to provide an extinguishing agent for extinguishing metal fires in electric and hybrid vehicles. The extinguishing agent according to the invention is non-conductive and adhesive.
    View on Google Patents
  7. Fire extinguisher and discharge nozzle assembly US-8893815-B2 2014 · MAUNEY RONALD C
    A fire extinguisher, a discharge nozzle assembly for discharging a fluid under pressure, and a method for discharging a wet chemical fire extinguishing agent are presented. The discharge nozzle assembly includes a nozzle housing a…
    View on Google Patents
  8. Valve-regulated fire extinguisher WO-2012008708-A1 2012 · FPG KOREA CO LTD
    The present invention relates to a new structured valve-regulated fire extinguisher, in which the fire extinguisher is configured to regulate the injection quantity of an extinguishing agent, thereby increasing the extinguishing e…
    View on Google Patents
  9. Valve head for a fire extinguisher, and use thereof WO-2012025623-A1 2012 · DELTA EXTINCTORS S A
    The present invention relates to a valve head for an extinguisher, characterized in that said valve head includes: a valve body comprising a central channel for receiving a stem and a side channel forming a channel for discharging…
    View on Google Patents
  10. Process for producing extinguishing agent and throw-type fire extinguisher US-8080169-B2 2011 · KARIYA KOUSHI
    A process is provided for producing an extinguishing agent. Sodium chloride and ammonium dihydrogenphosphate are dissolved in hot water at a temperature of 30 to 40° C. to form a solution. Ammonium hydrogen carbonate is dissolved …
    View on Google Patents
  11. Polyvalent valve for fire extinguishers WO-2009013378-A3 2009 · AYKAN XXI S L
    The invention relates to a polyvalent valve for fire extinguishers, comprising a head (1) with an inner chamber (2), a first mouth (3) for coupling to the container (20), a second outlet mouth (4) for connecting to a nozzle or hos…
    View on Google Patents
  12. Valve for the manual and automatic operation of a fire extinguisher WO-2006084931-A1 2006 · FUESCA SL
    The invention relates to a valve for the manual and automatic operation of a fire extinguisher of the type that comprises a container into which a fire extinguisher agent and a propellant gas are introduced. According to the inve…
    View on Google Patents
  13. Nozzle for small capacity fire extinguisher WO-2006103097-A1 2006 · UNISANTIS EUROP GMBH
    A nozzle is provided particularly for use with small capacity fire extinguishers having, for example, capacities of two to four litres. The nozzle is configured to provide a turbulence-generating channel designed to impart turbule…
    View on Google Patents
  14. Fluid spray nozzle and fire extinguisher US-6886640-B1 2005 · OBSCHESTVO S ORGANICHENNOI OTV
    The invention is aimed at generating a finely dispersed gas-and-drop flow with its cross-section in the shape of an ellipse and uniform intensity distribution. A fluid spray nozzle is built in the form of a body (1) with two coaxi…
    View on Google Patents

What this means for your idea

Because patents cover specific combinations of features, the useful question is not “has a fire extinguisher been patented?” but “has my combination of features been described before?” Household products tend to differ in the mechanism (how something attaches, folds, dispenses or cleans) rather than the basic idea.

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Guides that help with this

First-look landscape. Not exhaustive. Not legal advice. This page lists keyword-matched publications from a limited database; it does not say whether any product is or isn't covered by a patent, whether a patent is still in force, or whether your idea is patentable. Consult a registered patent attorney or agent.