Class 252/964 - LEAK DETECTION

Subclass of Class 252 - Compositions
Definition: Art collection of material related to physical indication
No. of patents: 36
Last issue date: 08/07/2007

Number	Title	Issue Date
7251984	Refrigerant with leak detection dye concentrate A container including a mixture of refrigerant and leak detection dye medium is disclosed for adding to an air conditioning or refrigeration system. The container includes a storage container adapted to communicate with an air conditioning or refrigeration system fo...	08/07/2007
7213534	Device and method for detection/indication of liquid leakage An improved device for the detection of leakage is achieved when the device includes at least two components, of which at least one is capable of migrating with the liquid within the carrier, and forming a distinct color or other detectable signal with the first com...	05/08/2007
7148066	Dye solutions for use in methods to detect the prior evaporation of anhydrous ammonia and the production of illict drugs Systems and methods providing for the introduction of a dye, particularly a xanthene dye, and more particularly a rhodamine dye, to liquid anhydrous ammonia to discourage theft of the anhydrous ammonia and provide for leak detection in storage vessels. The dye will ...	12/12/2006
6851442	Fluid addition apparatus An apparatus for adding fluid to a closed system can be connected to a service port of the system. The fluid can be added to the system by actuating valves on the system and on the fluid supply. The apparatus facilitates clean addition of the fluid to the system. Th...	02/08/2005
6807976	Fluid addition apparatus An apparatus for adding fluid to a closed system can be connected to a service port of the system. The fluid can be added to the system by actuating valves on the system and on the fluid supply. The apparatus facilitates clean addition of the fluid to the system. Th...	10/26/2004
6746630	Oxygen scavengers independent of transition metal catalysts The claims are drawn to a method of detecting seal breakage or incomplete seal formation in a package, said method comprising the steps of: (i) providing said package, prior to sealing, with a strip or ring of an indicator comprising an oxygen scavenging composition...	06/08/2004
6436311	Sampling material for a carbonyl compound in a gas A sampling material for a carbonyl compound in a gas comprising a reagent capable of converting a carbonyl compound to a derivative thereof supported on a cation exchanger; and a sampling cartridge for a carbonyl compound in a gas wherein a sampling mater...	08/20/2002
6248890	Naphthalimide diester fluorescent tracers having improved solubility and fluorescence A fluorescent naphthalimide diester dye that is miscible or soluble in a variety of organic compounds such as, for example, mineral oil, polyalkylene glycols, polyolesters, motor oil, gear oil, synthetic oils, and polyalphaolefins, is provided. The fluore...	06/19/2001
6183663	Leak detection dye delivery system A leak detection dye delivery system for introducing a leak detection dye into a climate control system is described. The leak detection dye delivery system includes a canister loaded with a leak detection dye composition including dye concentrate, a lubr...	02/06/2001
6170320	Method of introducing an additive into a fluid system, especially useful for leak detection, as well as an apparatus for leak detection and a composition useful for leak detection An additive is introduced into a fluid system and dissolved in a carrier fluid which is immiscible or slightly miscible in the fluid system, wherein the carrier fluid is subsequently removed from the fluid system. This method can be used to detect leaks, ...	01/09/2001
6165384	Full spectrum fluorescent dye composition for the optimization of leak detection processes A fluorescent dye composition for inclusion in a fluid for leak detection applications is provided which is responsive to a broad range of UVA, blue, and UVA-blue light sources. The composition comprises a mixture of a perylene dye, a naphthalimide dye, a...	12/26/2000
6132636	Leak-detecting refrigerant compositions containing oxazolyl-coumarin dyes Refrigerant compositions containing oxazolyl-coumarin dyes for leak detection under ultraviolet light, and methods for the use of such dyes in leak detection....	10/17/2000
6101867	Dye concentrate A dye concentrate for introducing a leak detection dye into a climate control system is described. The dye concentrate is a mixture of a lubricant and at least 40 weight percent of a leak detection dye. The dye concentrate can be thixotropic, a paste, or ...	08/15/2000
6070455	Leak detection additives A dye-delivery structure for introducing a leak detection dye into a climate control system is described. The dye-delivery structure is formed by compression or molding a leak detection dye and a binding agent into a dye-delivery structure such as a table...	06/06/2000
6070454	Leak detection additives for use in heating, ventilating, refrigeration, and air conditioning systems A leak detecting dye for use in heating, ventilating, air conditioning, or refrigeration systems employing a dye powder form of dyes such as naphthalimide, perylene, coumarin, and thioxanthane. The dye is formulated into a useful liquid or paste mixture by mix...	06/06/2000
6013697	Tire sealant composition A tire sealant mixture contains water, mica flakes, hydrated bentonite clay, and a water-miscible carrying agent such as propylene glycol. This sealant mixture is capable of sealing a puncture caused by a 3mm diameter nail without significant pressure los...	01/11/2000
5988945	Method for preventing corrosion of the vessel of a storage tank, and storage tank for implementing it A method prevents corrosion of a vessel made of a corrodible material. The vessel has a bottom which has an outer surface. The method includes detecting the appearance of water at the outer surface of the bottom of the vessel....	11/23/1999
5979226	Leak detection additives for oil or fuel systems A dye-delivery composition for introducing a leak detection dye into an engine oil or fuel system is described. The dye-delivery composition is a mixture of a lubricant and a leak detection dye. The dye-delivery composition can be thixotropic, a paste, a ...	11/09/1999
5942186	Adhesive plate with indicator function and indicator therefor An adhesive plate with an indicator function, and an indicator therefor, according to one embodiment the adhesive plate being comprised of a hydrophilic composition containing a water-soluble coloring matter such as a food color, a dye, a pigment, or meta...	08/24/1999
5934830	Apparatus for preventing corrosion of the vessel of a storage tank A method prevents corrosion of a vessel made of a corrodible material. The vessel has a bottom which has an outer surface. The method includes detecting the appearance of water at the outer surface of the bottom of the vessel....	08/10/1999
5783110	Composition for the detection of electrophilic gases and methods of use thereof There is provided a composition for the detection of an electrophilic gas, such as chlorodifluoromethane or carbon dioxide, which comprises a Lewis base capable of removing a proton from the gas or reacting therewith in a similar electrophilic manner; a d...	07/21/1998
5589631	Leak detection with non-toxic liquids Systems for fluids (including liquids) and materials with a fluid phase. The material is confined in a primary containment, and a secondary containment is used to keep fluid leaking from the primary containment from the surrounding environs and to keep le...	12/31/1996
5560855	Method of tagging and subsequently indentifying refrigerant lubricants A polyol ester or poly-alkylene glycol lubricant is tagged by adding to the lubricant a chemical marker which is stable over the temperature cycling range of a refrigerant. In testing for the presence of the marker, a sample of a lubricant is obtained, an...	10/01/1996
5357782	Leak detection in heating, ventilating and air conditioning systems using an environmentally safe material Refrigerant leakage in heating, ventilating and air conditioning systems employing hydrofluorocarbon refrigerants is determined by adding a mixture of predetermined amounts of a naphthalamide optical brightener with an appropriate lubricant to the system....	10/25/1994
5352244	Process for tracing liquid flow with a dye-impregnated paper strip A dye strip for tracing liquid flow comprises a water-soluble paper impregnated with tracing dye. The dye-impregnated paper is in a dry form prior to use. A process for preparing the biodegradable dye strip calls for providing a water-soluble paper, commu...	10/04/1994
5320967	Boiler system leak detection Leakage of water from a boiler water system wherein steam is generated in a boiler from feedwater fed to the boiler, and the concentration of impurities in the boiler water within the boiler is reduced by withdrawing fractions thereof as blowdown while ad...	06/14/1994
5149453	Method for detecting leakage in a refrigeration system A leak detectable refrigeration composition comprising an effective amount of a fluorescent, alkyl substituted perylene dye dissolved in a refrigeration oil and a polyhalogenated hydrocarbon refrigerant, is prepared for use in refrigeration systems in aut...	09/22/1992
4822743	Method and cloth for detecting leaks in closed bodies A reusable indicating material for detecting leaks in sealed structures and other closed bodies comprises a fabric saturated with an indicator solution containing an acid-base indicator, a surfactant, a buffering system and a humectant. The indicator solu...	04/18/1989
4791155	Assembly for monitoring ionising radiation An assembly for monitoring ionising radiation which comprises coated on a base a binder layer containing a polychlorinated hydrocarbon and a color former. The assembly can be used to monitor levels of radiation of from 0.1 MRads to 10.0 MRads....	12/13/1988
4784959	Method of detecting hydrocarbon fuel leaks A method of and apparatus for detecting fuel leaks employing color variable indicators. The method comprises the steps of preparing and applying a water soluble non-staining indicator dye to a test surface, observing color changes indicative of hydrocarbo...	11/15/1988
4758366	Polyhalogenated hydrocarbon refrigerants and refrigerant oils colored with fluorescent dyes and method for their use as leak detectors A leak detectable refrigeration composition including a polyhalogenated hydrocarbon refrigerant, a refrigeration oil, or a mixture of the two having a fluorescent dye dissolved therein, is prepared for use in refrigeration systems in automobile air condit...	07/19/1988
4636475	Apparatus and method for monitoring stored material An apparatus and method for monitoring stored material is disclosed. Material to be stored and monitored is placed within the innermost container of a series of nested containers and monitoring fluids are circulated in a closed loop of fluid flow through ...	01/13/1987
4615828	Method and apparatus for detecting hydrocarbon fuel leaks A method of and apparatus for detecting fuel leaks employing color variable indicators. The method comprises the steps of preparing and applying a water soluble non-staining indicator dye to a test surface, observing color changes indicative of hydrocarbo...	10/07/1986
4487613	Odorization of combustible hydrocarbon gases Described is a warning agent for the odorization of gaseous hydrocarbon fuels based on mixtures of at least one of the compounds, 2-methoxy-3-isobutyl pyrazine having the structure: ##STR1## and 4-methyl-4-mercapto-2-pentanone having the structure: ...	12/11/1984
3991360	Sensor assembly for a halogen gas leak detector A sensor assembly for a halogen gas leak detector characterized by including a tubular, porous, high purity Alumina (Al2 O3) element for supporting electrode and heater components in spaced-apart relationship relative to one another ...	11/09/1976
3955929	Gas detecting sensor Gas detecting sensor made of SnO2 characterized by containing less than 5% by weight of at least one of Al2 O3, ZnO, SrO and BaO and less than 1% by weight of chlorine. The gas detecting sensor has a high sensitivity selec...	05/11/1976

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Class 252/964 - LEAK DETECTION