William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 8158433 | Fragmented taggant coding system and method with application to ammunition tagging The present invention relates to identification tagging, and is specifically directed to identification tagging of ammunition. An isotopic taggant is deposited in a layer at the interface between the primer and the propellant so that, as the ammunition is fired, the... | 04/17/2012 |
| 8158432 | Method and system for marking and determining the authenticity of liquid hydrocarbons System (50) for marking a fluid by a marker, the fluid flowing from a source to a destination, the system including a sensor (58) for determining a value of a fluid property and a fluid flow controller (54) for admitting a selected amount of the... | 04/17/2012 |
| 8153435 | Methods and articles for identifying objects using encapsulated perfluorocarbon tracers A system and method for tagging, tracking, locating and identifying people and vehicles transporting people using Perfluorocarbon tracers. An on-going problem faced by military as well as law enforcement personnel is that of friendly fire incidents. To prevent possi... | 04/10/2012 |
| 8129190 | Tagged petroleum products and methods of detecting same Tagged products (including tagged petroleum products) and methods of detecting the same are disclosed. The tagged petroleum products are tagged with a violanthrone, e.g., a substituted violanthrone and/or an isoviolanthrone, e.g., a substituted isoviolanthrone. ... | 03/06/2012 |
| 8124414 | Taggants, method for forming a taggant, and a method for detecting an object A taggant comprising at least one perfluorocarbon compound surrounded by a polyphosphazene compound. The polyphosphazene compound has the chemical structure: wherein G1 and G2 are pendant groups having... | 02/28/2012 |
| 8119408 | Encoded carrier and a method of monitoring an encoded carrier A method of tracking target molecules produced in a chemical reaction the method comprising providing a reaction region on a carrier, the carrier being arranged such that the target molecules react with the reaction region causing flexion of the carrier introducing ... | 02/21/2012 |
| 8071386 | Method of marking a product, marked product resulting thereof, and method of identifying same A method and means for identifying the authenticity and the genuine nature of a solid or liquid bulk material, by incorporating a marking composition containing at least one trace ion into the said bulk material, whereby the total concentration of the incorporated t... | 12/06/2011 |
| 8053240 | Formulations for imparting traceability and/or trackability to one or more chemicals The invention relates to chemical formulations that can be used to render such chemicals easier to identify upon application to a surface. In one embodiment, the present invention relates to formulations designed to render herbicides, fungicides, pesticides, insecti... | 11/08/2011 |
| 7977102 | Isotopically labeled compositions and method Compounds having stable isotopes 13C and/or 2H were synthesized from precursor compositions having solid phase supports or affinity tags. ... | 07/12/2011 |
| 7964407 | Methods of marking products using natural materials having genetically controlled micromorphological structures as markers Methods of marking products and of determining the origin or authenticity of marked products are provided that use a variety of natural materials as markers. The natural materials have unique genetically controlled micromorphological structures that can be identifie... | 06/21/2011 |
| 7943381 | Method for testing specimens located at a plurality of service sites A system for automatically testing a fluid specimen, e.g., urine, to indicate the presence of specified chemical components in the specimen. The system preferably utilizes an assaying device comprised of a collection cup and a cap which carries at least one test str... | 05/17/2011 |
| 7919326 | Tracking a status of a catalyst-driven process using RFIDs A method of tracking a status of a catalytic process in a mixture incorporates the use of Radio Frequency Identification (RFID) tags that have corrosive-sensitive coatings. The coatings are removable, by a corrosive in the mixture, at a rate that tracks with the rat... | 04/05/2011 |
| 7919325 | Method and apparatus for monitoring liquid for the presence of an additive The present invention relates to an apparatus and methods for the identification or authentication of liquid products by the addition of an anti-Stokes marker. The invention features an apparatus and method for the identification of a liquid, dynamic or static, that... | 04/05/2011 |
| 7875457 | Erasable taggant distribution channel validation method and system To address counterfeit problems, for example, we propose a secure, flexible, and cost-effective authentication solution that can be integrated into conventional distribution logistic systems. The proposed solution for product authentication and distribution channel ... | 01/25/2011 |
| 7858373 | Chemical markers A method for marking a petroleum hydrocarbon, a biodiesel fuel or an ethanol fuel, by adding an organic marker compound. ... | 12/28/2010 |
| 7842505 | Fluorescent labeling reagent A fluorescent labeling reagent of the present invention includes an inorganic fluorescent particle and a material (A) having a material (B) of biological origin adsorbed or bound thereto. The inorganic fluorescent particle is integrated with the material (A) so as t... | 11/30/2010 |
| 7820446 | System for tracking a spatial position of an object via a tracking system A transparent marker casing for use with a tracking system, comprising a material that is transparent to radiation emanating from at least one marker, wherein the marker casing is formed such that it at least partially surrounds the at least one marker. The casing c... | 10/26/2010 |
| 7807468 | Methods of marking and testing pharmaceutical products Methods of marking pharmaceutical products for use in clinical trials and for determining the origin or authenticity of the marked products are provided that use a variety of natural materials as markers. The natural materials have unique genetically controlled micr... | 10/05/2010 |
| 7799568 | Authentication of products using molecularly imprinted polymers A method for identifying a product includes providing a solid body (10) fabricated from at least a molecularly imprinted polymer having molecular sized cavities (12) adapted to selectively receive and bind molecules (50) having a specific taggan... | 09/21/2010 |
| 7767457 | Method of use of taggants An investigation process includes dispersing particulate taggants at a transit point with recordation of the transit point location. A subject passing the transit point has adhered to them at least one taggant from the transit point. Collection of the at least one t... | 08/03/2010 |
| 7763469 | Method for automatic encrypted marking and identifying the liquids The invention provides a method for automatic encrypted marking of liquids and for identifying liquids marked by using this method. For marking certain number of markers is selected and for every marker a random number is generated, which define the amount of a mark... | 07/27/2010 |
| 7741120 | Multifunctional nanocrystals Multifunctional nanocomposites are provided including a core of either a magnetic material or an inorganic semiconductor, and, a shell of either a magnetic material or an inorganic semiconductor, wherein the core and the shell are of differing materials, such multif... | 06/22/2010 |
| 7704746 | Method of detecting leakage from geologic formations used to sequester CO The invention provides methods for the measurement of carbon dioxide leakage from sequestration reservoirs. Tracer moieties are injected along with carbon dioxide into geological formations. Leakage is monitored by gas chromatographic analyses of absorbents. The inv... | 04/27/2010 |
| 7691635 | Labeling reagents, methods for the synthesis of such reagents and methods for the detection of biological molecules The present invention relates to a temperature-stable labeling reagent of formula (0): in which: R1 represents H or an alkyl, aryl or substituted aryl group, R | 04/06/2010 |
| 7687271 | Covert authentication method and apparatus An authentication system uses the unique distribution of an invisible taggant as a “signature” to identify an item. The verification is error tolerant. The taggant is made visible to a camera by special illumination. Inert taggants, with no optical activity, can... | 03/30/2010 |
| 7674625 | Method for determining improper manipulation of urine samples using marker compounds The invention relates to a diagnostic method and to marker substances which enable manipulations in endogenic marking to be detected and thus prevented. According to the invention, a metabolizable substance is added to non-metabolizable marker substances, said metab... | 03/09/2010 |
| 7666682 | Marking system A marking system that allows remote observations of visual and infrared electromagnetic signatures emitted from a distinctive marker panel. A kit employing such panels is particularly suitable for military environments, which, in turn, enhances the survivability of ... | 02/23/2010 |
| 7638338 | Measurement and calibration method for sample injection volume and mobile phase delivery rate in a ultra micro-scale liquid phase delivery system The present invention provides a method for measuring and calibrating sample injection volume or mobile phase delivery rate of any type of micropumps or their integrated systems by using the direct proportion of the total activity (or mass) to the delivery rate (or ... | 12/29/2009 |
| 7632682 | Anthraquinone colorant compositions and methods for producing the same This invention relates to compositions of N,N′-dialkyleneoxy-substituted 1,4-diaminoanthraquinone colorants which contain a low percentage of impurities, to a process to make the compositions, and also to the use of the compositions thus prepared for coloring cons... | 12/15/2009 |
| 7622303 | Methods for identifying patients at risk for life threatening arrhythmias In general, the invention is directed to systems and techniques for assessing a risk of ventricular tachyarrhythmia in a patient by measuring one or more biochemical markers that reflect the health of a patient. Typically, the patient submits a sample, such as a blo... | 11/24/2009 |
| 7507582 | Method and device for multicolour 2-photon fluorescence coincidence analysis A method of fluorescence measurement on analytes, marked with different fluorescent markers, which have spectrally different fluorescence emissions, in a sample is described, having the following steps: illumination of the sample in the measurement volume using a la... | 03/24/2009 |
| 7427506 | High throughput property testing of olefin copolymers using rheological determinations A high throughput method to determine an amount of a comonomer in a copolymer sample of a copolymer system comprises the steps of providing a plurality of copolymer samples; creating an array of the copolymer samples; measuring a sample complex modulus of each of th... | 09/23/2008 |
| 7423131 | Busulfan immunoassay Novel conjugates of busulfan and novel busulfan immunogens derived from α-substituted derivatives of busulfan and antibodies generated by these busulfan linked immunogens are useful in immunoassays for the quantification and monitoring of busulfan in biological flu... | 09/09/2008 |
| 7413868 | Use of particulate labels in bioanalyte detection methods New applications for the use of distinguishable particulate labels available in a variety of hues and sized in the submicron range are described. These applications include profiling of cellular components, obtaining secretion patterns, identifying a multiplicity of... | 08/19/2008 |
| 7410805 | Aerosol detection system using optical and mass discrimination A system to detect and identify various aerosol agents, such as biological agents which have been aerosolized, is disclosed. The system generally includes a mechanism to collect a selected sample of atmosphere which may include the aerosol agent, a sub-system to det... | 08/12/2008 |
| 7402800 | Method and device for the continuous determination of damage to systems used for the post-treatment of heat engine exhaust gases The invention relates to a method for the continuous determination of the damage to at least one system (7) used for the post-treatment of exhaust gases from an internal combustion engine (2), caused by the lubricating oil, the fuel and/or at least one... | 07/22/2008 |
| 7393656 | Methods and compositions for risk stratification The present invention provides an approach for the simultaneous determination of the activation states of a plurality of proteins in single cells. This approach permits the rapid detection of heterogeneity in a complex cell population based on activation states, and... | 07/01/2008 |
| 7391040 | Thermal image beacons A heat emitting beacon having a rotating parabolic mirror to concentrate the heat from a gas heat source, said mirror back being coated with a passive cold emission material comprised of a metalized plastic film creased and crumpled to form a multitude of reflective... | 06/24/2008 |
| 7390666 | Methods and devices for measuring total polar compounds in degrading oils This invention relates to methods for determining whether or not to discard a sample of oil based on the presence of polar compounds in the oil and devices to be used therewith. In a preferred embodiment a test strip including an adsorbent affixed to a backing is sp... | 06/24/2008 |
| 7389706 | Method to detect and characterize contaminants in pipes and ducts with interactive tracers A method and an apparatus for detecting, locating, and quantifying contamination in a fluid flow system like a pipe or duct. This characterization technique uses a conservative and one or more interactive tracers that are injected into the fluid flow system and then... | 06/24/2008 |