Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 8043490 | Electrochemical sensor A combination electrode, including: A first tube; a measuring membrane, which sealedly closes the first tube to form a measuring chamber; a second tube, which surrounds the first tube and is connected borderingly with the first tube to form an annular reference cham... | 10/25/2011 |
| 7976690 | Method for production of responsive glass membrane for ion electrode, responsive glass membrane for ion electrode, and ion electrode Disclosed is a sensitive glass film for a pH electrode, which is not deteriorated in its glass strength or pH-measuring function, which is hardly stained, and from which any stain can be removed easily. Also disclosed is a pH electrode having the sensitive glass fil... | 07/12/2011 |
| 7547379 | Responsive glass membrane for ion selective electrode and ion selective electrode The present claimed invention intends to provide a responsive glass membrane for ion selective electrode glass and an ion selective electrode comprising the responsive glass membrane that produces a self-cleaning function when the ultraviolet rays are irradiated alt... | 06/16/2009 |
| 7373195 | Ion sensor for long term use in complex medium Devices and methods for measuring a target ion concentration uses an electrode pair. The pair includes a working electrode and a reference electrode. The working and reference electrodes are ion-selective electrodes (ISEs). The reference ISE can include a sodium ISE... | 05/13/2008 |
| 7319295 | High-frequency power supply structure and plasma CVD device using the same A radio frequency power supply structure and a plasma CVD device comprising the same are provided in which reflection of radio frequency power at a connecting portion where an RF cable connects to an electrode is reduced so that incidence of the radio frequency powe... | 01/15/2008 |
| 7318273 | Method for producing pH probes A method for producing a pH measuring probe includes: providing an electrode wire protruding out of both sides of a recording device, the electrode wire being fixed to the recording device with the first end thereof, placing a glass tube over a second end of the ele... | 01/15/2008 |
| 7314541 | Ion measuring composite electrode The present invention provides an improved ion measuring composite electrode, measuring instrument incorporating the composite electrode, and a manufacturing method for forming a preform of a composite double glass pipe for forming the ion measuring composite electr... | 01/01/2008 |
| 7291496 | Ultrasensitive biochemical sensor An electronic sensor is provided for detecting the presence of one or more analytes of interest in a sample. The sensor preferably comprises a field effect transistor in which conductance is enhanced by analyte binding to receptors in the active region. An array of ... | 11/06/2007 |
| 7276145 | PH electrode An object of the present invention is to suppress an electric potential drift as described above and improve pH measurement precision in order to obtain practical measurement precision in the dry-type multilayered film-type pH electrode. The present invention provid... | 10/02/2007 |
| 7238267 | Self-condensing pH sensor The present invention pertains to an apparatus and a means of constructing a pH sensor that can detect changes in pH levels of humidified gases and liquid samples. When electronically connected to a computerized or analog display means, sensitive quantitative measur... | 07/03/2007 |
| 7189315 | Ion sensor and clinical analyzer using the same An ion sensor has a flow path through which a sample flows. An ion-exchange membrane is in contact with the sample in the sample flow path. An internal solution is provided on one side of the ion-exchange membrane. An internal electrode is provided so as to come in ... | 03/13/2007 |
| 7182847 | System and probe for monitoring pH levels of a sample medium A system for monitoring a pH level of a sample medium is disclosed herein as including a pH probe having a pH-sensitive electrode, a reference electrode and a temperature electrode arranged within a housing of the pH probe. The probe housing generally includes a fle... | 02/27/2007 |
| 7166201 | Self-condensing pH sensor The present invention pertains to an apparatus and a means of constructing a pH sensor that can detect changes in pH levels of humidified gases and liquid samples. When electronically connected to a computerized or analog display means, sensitive quantitative measur... | 01/23/2007 |
| 7144488 | Electrode, electrochemical cell, and method for analysis of electroplating baths A counter electrode for use in an electrochemical cell suitable for analysis of an electroplating composition, the counter electrode comprising a conductor; a sheath disposed about the conductor; an electrolyte disposed within the sheath; and an optionally porous el... | 12/05/2006 |
| 7130780 | Method and instrument for electronically recording and imaging fluid washover via measuring characteristics of the fluid at multiple locations simultaneously An array of electrically isolated electrode pairs in combination with a specially configured processor, e.g., a personal computer, is employed to obtain a continuous real-time acquisition, processing, mapping and visualization of fluid washover. In a specific applic... | 10/31/2006 |
| 7067343 | ISFETs fabrication method Methods for fabricating ion sensitive field effect transistors (ISFETs) with SnO2 extended gates. A SnO2 detection film is formed on a substrate by sol-gel technology to serve as an extended gate. The SnO2 detection film is electrica... | 06/27/2006 |
| 6793787 | Ion-selective electrode An improved ion-selective electrode with enhanced sensitivity and reliability. The electrode is readily formed from an electrode assembly sealingly joined to the upper end of an electrode chamber whose lower end opens into in a tube bore of substantial path length t... | 09/21/2004 |
| 6495012 | Sensor for electrometric measurement The invention provides a sensor with a reference electrode and a flowing electrolyte which is particularly useful for measuring the ion concentration of a process solution. The invention includes a sensor having a pressurized reservoir which provides flow... | 12/17/2002 |
| 6419809 | Miniature reference electrode A miniature reference electrode with improved stability and durability formed of a miniature silver/silver chloride reference electrode with high stability and general applicability as a reference electrode. The miniature reference electrode includes, on ... | 07/16/2002 |
| 6416653 | Device for separating electrolyte chambers within an electrochemical sensor The present invention is drawn generally to an improved electrochemical sensor. The reference cell within the sensor can be a salt bridge comprising at least two chambers for containing an electrolyte fluid, preferably containing a semipermeable plug impr... | 07/09/2002 |
| 6398931 | Combination ion-selective electrode with a replaceable sensing membrane An improved combination ion-selective electrode apparatus is provided that comprises an electrode body, a reference electrode, and an ion-sensing electrode. The reference electrode comprises a ion-permeable junction. A removable membrane cap contains a io... | 06/04/2002 |
| 6395158 | PH sensor with electrical noise immunity A sensor for measuring pH of a solution includes a housing with an exterior surface for exposure to the solution. A measuring glass electrode within a tubular circuit ground electrode extends through the exterior surface. A reference glass electrode is re... | 05/28/2002 |
| 6322680 | Universal ion-selective meter The proposed multipurpose ion-selective sensor is designed to be operational in any spatial position in harsh environment and incorporates a housing tube (1) where a number of elements are fixed and electrically connected to a measurement transmitter; the... | 11/27/2001 |
| 6221222 | Reference electrode solution containing organic ammonium and phosphonium salts for potentiometric measurement of pH The present invention provides a reference electrode solution containing ammonium salts and phosphonium salts for the potentiometric measurement of pH and method of using the same. The use of the ammonium salts and the phosphonium salts to replace potassi... | 04/24/2001 |
| 6168707 | Ion measurement apparatus and methods for improving the accuracy thereof The accuracy and temperature-independence of ion-selective electrode meters having a logarithm resistance temperature correction incorporated therein is enhanced by using a microprocessor controlled and measured circuit with switched reference and switche... | 01/02/2001 |
| 6162337 | Large area ion concentration measuring electrode and method of manufacturing same An ion concentration measuring electrode unit includes a body member having a plurality of capillary tubes extending through the body member to provide a plurality of passageways for a sample fluid to be tested. The gaps between the hollow tubes are seale... | 12/19/2000 |
| 6139707 | pH electrode arrangement A pH electrode arrangement comprises an inner wire electrode of silver sulfide, and a fill solution comprising a solution of sodium thiosulphate, a buffer, and an antioxidant. The arrangement has a fast response to a change in temperature, a half cell nea... | 10/31/2000 |
| 6068745 | Method for forming an electrochemical sensor A method of producing a medium-tight connection between interior and exterior concentrically-arranged glass tubes includes the steps of providing a longitudinally extending electrical conductor strip between the interior and exterior tubes, forming a bulg... | 05/30/2000 |
| 6033543 | Electrochemical sensor A method of producing a medium-tight connection between interior and exterior concentrically-arranged glass tubes includes the steps of providing a longitudinally extending electrical conductor strip between the interior and exterior tubes, forming a bulg... | 03/07/2000 |
| 5980712 | Single-rod measuring element for electrochemical measurements A single rod measuring probe has a hollow probe portion which contains an electrolyte solution and an electrical connector plug. The hollow probe portion and electrical connector plug are joined by a refill unit which receives the probe portion and plug i... | 11/09/1999 |
| 5942388 | Electrobiochemical method and system for the determination of an analyte which is a member of a recognition pair in a liquid medium, and electrodes thereof An elcctrobiochemical system for the determination of the presence and optionally concentration of an analyte in a liquid medium, the system comprising an electrode having immobilized thereon a member of a recognition pair, the other member of said pair b... | 08/24/1999 |
| 5939610 | Ion concentration measuring apparatus with internal calibration fluid reservoir An ion concentration measuring apparatus having a housing member with a measuring electrode assembly movably mounted within the housing member is provided. A calibration fluid reservoir is also mounted within the housing member. The measuring electrode as... | 08/17/1999 |
| 5837113 | Small glass electrode A small glass electrode and process for preparation thereof, the small glass electrode having a bonded structure and comprising a reference electrode composed of silver/silver chloride, a glass substrate having a pad embedded therein, the pad being compos... | 11/17/1998 |
| 5766432 | Method and device for eliminating electrode drift A pH-measuring method and device for monitoring and then correcting for electrode drift is provided. The device includes a pH-measuring electrode and more than one reference electrode. During operation, the pH-measuring device is place in contact with a s... | 06/16/1998 |
| 5660741 | Process for preparation of small glass electrode A small glass electrode and process for preparation thereof are disclosed. This small glass electrode is characterized in that said glass electrode, which has a bonded structure comprises a reference electrode composed of silver/silver chloride, a glass s... | 08/26/1997 |
| 5658451 | Method for calibration of a pH measuring element In a method for calibration of a pH measuring element whose ion-permeable, hydrophilic polymer layer is brought into contact with an aqueous solution prior to calibration, the aqueous solution is displaced or replaced by a gaseous calibrating medium, and ... | 08/19/1997 |
| 5582699 | pH glass electrode In the pH glass electrode comprising a double-walled glass tube in which an electrical screen is provided between the walls, the inner glass tube is sealed at one end with a glass lid and at the other end with a pH-sensitive glass membrane which forms, wi... | 12/10/1996 |
| 5567291 | PH glass electrode In the pH glass electrode comprising a double-walled glass tube in which an electrical screen is provided between the walls, the inner glass tube is sealed at one end with a glass lid and at the other end with a pH-sensitive glass membrane which forms, wi... | 10/22/1996 |
| 5466348 | Methods and devices for enhanced biochemical sensing A method and application for detecting and measuring the presence of a binding target material employs a semiconductor device having a receptor-covered surface topgate, separated by a dielectric layer from a substrate. Receptors attached to this surface e... | 11/14/1995 |
| 5419826 | Ion-selective reference probe An ion-selective reference probe which is adapted for use with potentiomec measurement systems is disclosed. The reference probe is non-chloride based and employs a specially adapted electrolyte which is reversible (i.e. with regard to ionic activity). M... | 05/30/1995 |
