Invalidity dossier
US 6520165
Added 9/21/2026, 10:40:09 AM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 6520165 B1
Title: Nozzle for emitting nitrous oxide for fuel to engines
Patent number / application: US 6520165 B1; application US10/003,944
Inventor / assignee: Michael Wayne Steele, listed as inventor; original and current assignee listed as "Individual."
Key dates: Priority and filing date 2001-10-23; granted and published 2003-02-18; a Canadian priority filing CA002408985A is listed 2002-10-18; anticipated expiration 2021-10-23. Legal status: Expired – Fee Related.
Classification: F02M25/00 (engine-pertinent apparatus for adding non-fuel substances to combustion air/fuel) and B05B7/0807 (spray apparatus with separate outlet orifices forming intersecting jets).
Purpose: To improve combustion in internal-combustion engines using a nitrous oxide system, enhancing fuel atomization to produce a more combustible mixture and greater horsepower. Nitrous oxide ("N2O") adds oxygen when it decomposes; added fuel enriches the mixture and keeps cylinder temperatures lower.
Plain-language scope: The nitrous oxide system has two emitting means. One emits a high-velocity cylindrical stream of nitrous oxide toward the intake manifold runner; the other emits a thin, fan-shaped spray of atomized fuel from a different location and direction. Their axes form an acute angle (a stated range of 35–60 degrees, preferably 45 degrees), and the streams intersect at a location spaced from both emitters in the direction of the intake manifold, where the nitrous stream impacts and further atomizes the fuel. Both outlets lie on the same side of the nozzle, laterally spaced along the tip end, with the nitrous oxide outlet closest to the distal tip. The fuel outlet is a very thin slot; fuel is supplied at about 5–80 psig, preferably 60 psig. The system also includes a nitrous canister, fuel tank, pump, pressure regulator, solenoid valves, conduits, and flow jet orifices for calibration.
Source: https://patents.google.com/patent/US6520165/en
What the excerpt does not establish: It does not provide the full specification, complete claim language, all drawing details, the full prior-art discussion (only partial references to U.S. Pat. No. 5,890,476 to Grant and a '766 Wood patent appear), prosecution history, or any litigation, ownership-transfer, or validity information.
Generated 10/1/2026, 10:01:21 PM
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Litigation summary
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Proceedings on file (0)
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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