Patent application number | Description | Published |
20080240543 | Calibration and normalization method for biosensors - Calibration and normalization methods for a grating-based sensor design are disclosed. The sensor may be constructed in a manner optimized for both label-free and luminescence, e.g. fluorescence, amplification detection in a single device. Such a sensor, based on grating or another periodical structure with appropriate coating, dramatically increases the diversity of applications and allows realizing novel concepts that provide qualitative and quantitative information/data for each location or capture element in the sensor surface. The invention takes advantage of these different modes to carry out a quality control (QC) step and a calibration of each individual location of the sensor. Thus, the assay data can be flagged according to their quality and local density variations, batch variations and variations in the printed deposition of probes or the materials to the surface can be compensated. | 10-02-2008 |
20090137422 | Methods for Identifying Modulators of Ion Channels - The invention provides methods for identifying modulators of ion channels without the use of recombinant cell lines over-expressing the ion channel proteins or the use of detection labels. | 05-28-2009 |
20090282931 | Simultaneous aspirator and dispenser for multiwell plates and similar devices - A method of making a measurement of binding affinity of a sample comprises the steps of: introducing the sample into a well having a bottom formed as a photonic crystal biosensor, wherein a portion of the sample becomes bound to the biosensor; making a measurement of the change in the shift in peak wavelength value as a function of time (k | 11-19-2009 |
20090305304 | High Resolution Label Free Analysis of Cellular Properties - The invention provides methods of detecting a change in cell growth patterns. | 12-10-2009 |
20100003743 | Grating-based sensor combining label-free binding detection and fluorescence amplification and readout system for sensor - A grating-based sensor is disclosed that has a grating structure constructed and designed for both evanescent resonance (ER) fluorescence detection and label-free detection applications. Some embodiments are disclosed which are optimized for ER detection in an air mode, in which the sample is dry. Other embodiments are optimized for ER detection in liquid mode, in which the sample is suspended in liquid medium such as water. One and two-dimensional gratings are also disclosed, including gratings characterized by unit cells with central posts, central holes, and two-level, two-dimensional gratings. A readout system for such sensors is also disclosed. One embodiment includes a first light source optimized for collecting label-free detection data, a second light source optimized for collecting ER fluorescence amplification data, and at least one detector. In one embodiment, the detector is an imaging system and includes a CCD camera for collecting both ER and label-free data. In other embodiments, the at least one detector takes the form of a spectrometer for collection of label-free data and a photomultiplier for collecting ER data. In other embodiments, a single light source such as a tunable laser or broad band light source is used. | 01-07-2010 |
20100043571 | Simultaneous aspirator and dispenser for multiwell plates and similar devices - A device for simultaneously dispensing a solution containing a sample to a test device and aspirating the sample from the device. In one embodiment the device is hand-held and includes a control mechanism, e.g., button for activating the dispensing and aspiration of the sample. The testing device may take the form of a multi-well plate with a plurality of wells arranged in rows and columns, with the bottom of the wells formed as a photonic crystal biosensor. The device can be configured with dispense and aspirate manifolds and associated dispense and aspirate ports which are positioned in all the wells along a row or column of wells so as to simultaneously aspirate and dispense solution to all the wells in a row or column of the multi-well plate. | 02-25-2010 |
20100143959 | GRATING BASED SENSOR COMBINING LABEL-FREE BINDING DETECTION AND FLUORESNCE AMPLIFICATION AND READOUT SYSTEM FOR SENSOR - A grating-based sensor is disclosed that has a grating structure constructed and designed for both evanescent resonance (ER) fluorescence detection and label-free detection applications. One and two-dimensional gratings are also disclosed, including gratings characterized by unit cells with central posts, central holes, and two-level, two-dimensional gratings. A readout system for such sensors is also disclosed. Various applications for the biosensors are described, including cell-based assays for assessing the effect of drug compounds, proteins, peptides and other materials on cell function. A biosensor embodiment optimized for a luminescent response at two different wavelengths is also described. Such luminescent response could be produced by fluorescence (either native or from an attached fluorophore), phosphorescence, chemi-luminescence, or other luminescence technology. Two different luminescence technologies could be combined on the same biosensor chip. | 06-10-2010 |
20100196925 | Methods for Screening Cells and Antibodies - The invention provides methods of detecting a change in cell growth patterns, methods of screening many different antibodies in one receptacle, and methods of detecting specific binding of an antibody to a protein or cell, wherein the antibody is in a mixture of many different antibodies. | 08-05-2010 |
20100202923 | Grating-based sensor combining label-free binding detection and fluorescence amplification and readout system for sensor - A grating-based sensor is disclosed that has a grating structure constructed and designed for both evanescent resonance (ER) fluorescence detection and label-free detection applications. One and two-dimensional gratings are also disclosed, including gratings characterized by unit cells with central posts, central holes, and two-level, two-dimensional gratings. A readout system for such sensors is also disclosed. Various applications for the biosensors are described, including cell-based assays for assessing the effect of drug compounds on cell function. A biosensor embodiment optimized for a luminescent response at two different wavelengths is also described. Such luminescent response could be produced by fluorescence (either native or from an attached fluorophore), phosphorescence, chemi-luminescence, or other luminescence technology. Two different luminescence technologies could be combined on the same biosensor chip. | 08-12-2010 |
20100227769 | GRATING-BASED SENSOR COMBINING LABEL-FREE BINDING DETECTION AND FLUORESCENCE AMPLIFICATION AND READOUT SYSTEM FOR SENSOR - A grating-based sensor is disclosed that has a grating structure constructed and designed for both evanescent resonance (ER) fluorescence detection and label-free detection applications. Some embodiments are disclosed which are optimized for ER detection in an air mode, in which the sample is dry. Other embodiments are optimized for ER detection in liquid mode, in which the sample is suspended in liquid medium such as water. One and two-dimensional gratings are also disclosed, including gratings characterized by unit cells with central posts, central holes, and two-level, two-dimensional gratings. A readout system for such sensors is also disclosed. One embodiment includes a first light source optimized for collecting label-free detection data, a second light source optimized for collecting ER fluorescence amplification data, and at least one detector. In one embodiment, the detector is an imaging system and includes a CCD camera for collecting both ER and label-free data. In other embodiments, the at least one detector takes the form of a spectrometer for collection of label-free data and a photomultiplier for collecting ER data. In other embodiments, a single light source such as a tunable laser or broad band light source is used. | 09-09-2010 |
20100291575 | Detection of Changes in Cell Populations and Mixed Cell Populations - The invention provides methods of label-free detection of changes in cell populations and mixed cell populations. | 11-18-2010 |
20100329933 | Grating-based sensor combining label-free binding detection and fluorescence amplification and readout system for sensor - A grating-based sensor is disclosed that has a grating structure constructed and designed for both evanescent resonance (ER) fluorescence detection and label-free detection applications. Some embodiments are disclosed which are optimized for ER detection in an air mode, in which the sample is dry. Other embodiments are optimized for ER detection in liquid mode, in which the sample is suspended in liquid medium such as water. One and two-dimensional gratings are also disclosed, including gratings characterized by unit cells with central posts, central holes, and two-level, two-dimensional gratings. A readout system for such sensors is also disclosed. One embodiment includes a first light source optimized for collecting label-free detection data, a second light source optimized for collecting ER fluorescence amplification data, and at least one detector. In one embodiment, the detector is in the form of an imaging system and includes a CCD camera for collecting both ER and label-free data. In other embodiments, the at least one detector takes the form of a spectrometer for collection of label-free data and a photomultiplier for collecting ER data. In other embodiments, a single light source such as a tunable laser or broad band light source is used. | 12-30-2010 |
20120040866 | High Resolution Label Free Analysis of Cellular Properties - The invention provides methods of detecting a change in cell growth patterns. | 02-16-2012 |
20120107840 | Methods for Label Free Testing of Cells - The invention provides methods of detecting activation of an immune cell, methods for detecting blocking or enhancing properties of a test reagent or stimuli on activation of one or more immune cells or platelets, methods for selecting hybridomas producing antibodies to an antigen for quality of strength of binding to the antigen, methods for determining if a subject has had an immune response to an immunogen, methods of isolating neutralizing antibodies for an immunogen, methods of classifying a B cell lymphoma, and methods for selecting activated B-cells expressing an antibody to one or more antigens. | 05-03-2012 |
20130130926 | Methods for Screening Cells and Antibodies - The invention provides methods of detecting a change in cell growth patterns, methods of screening many different antibodies in one receptacle, and methods of detecting specific binding of an antibody to a protein or cell, wherein the antibody is in a mixture of many different antibodies. | 05-23-2013 |