Invalidity dossier
US 3416730
Apparatus for providing multiple liquid jets
Current assignee: Individual
Added 9/17/2026, 1:11:01 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 3,416,730
Title: Apparatus for Providing Multiple Liquid Jets
Inventor: Charles C. Perry
Assignee: None stated — listed as "Individual" (original assignee also Individual)
Application No.: US 664,554, filed Aug. 30, 1967, Ser. No. 664,554
Publication/Grant Date: Dec. 17, 1968
Priority Date: June 5, 1963 (claimed from US 285,764, which issued as Patent No. 3,368,760, dated Feb. 13, 1968; the 1967 application is a division)
Legal Status: Expired — Lifetime (anticipated expiration Dec. 17, 1985)
Purpose (from the "Definitions" section): To supply a multiple-component liquid jet — two or more liquids — where a "jet" is an unsupported free stream of liquid in space that is very long relative to the diameter of the orifice from which it issues. The excerpt lists possible purposes: transporting one or more liquids by disposing them within or on the surface of a transporting liquid; maintaining jet integrity or unity by coating it with a second liquid (e.g., high viscosity and/or surface tension); protecting the jet from atmosphere contact; and conducting two highly reactive liquids to a reaction site with a barrier liquid between them.
Plain-language scope: A plurality of substantially concentric nozzles are connected to passages supplying different liquids. The apparatus directs jets of different liquids in parallel relation so they contact one another while traveling at the same velocity, so that there is no mixing and no momentum transfer at the initial area of contact, maintaining a finite area of demarcation. Indicating mechanisms (meters) in the passages indicate a liquid parameter indicative of velocities, with valves regulating flow so issuing jets travel at equal velocity on initial contact. Figures 1–5 show nozzle forms (including a diaphragm/nozzle arrangement forming an annular discharge opening and a three-liquid barrier form); Figures 6–8 show control systems. "Liquid" is defined broadly to include emulsions, dispersions, resins, colloids, suspensions, and composite liquids.
What the excerpt does not establish: It provides no claims text, no complete specification, no prior-art discussion, and no full description of Figures 6–8; it therefore cannot establish the exact metered parameter, specific claim scope, or embodiments beyond those described.
Generated 10/1/2026, 10:03:16 PM
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Litigation summary
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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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