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| Number | Title | Issue Date |
| 7023138 | Electron impact ion source An ion source configured for integration into both existing ion implanters used in semiconductor manufacturing and emerging ion implantation platforms. The ion source in accordance with the present invention includes the following features, all of which depart from ... | 04/04/2006 |
| 5739699 | Method and apparatus for ion discrimination in an electron capture detector Electron capture detector for use with an effluent stream from a gas chromatograph includes an electron source means and an adjacent ionization chamber in which electron capture takes place. The active region of the ionization chamber is disposed to recei... | 04/14/1998 |
| 5703488 | Instrument for measuring plasma excited by high-frequency This instrument can measure parameters of a plasma accurately and easily even though the plasma is exited by a high-frequency. The instrument for measuring parameters of a plasma generated in a vacuum chamber by high-frequency discharge at a given frequen... | 12/30/1997 |
| 5426056 | Surface ionization detector for detecting trace amounts of organic molecules A surface ionization detector for detecting organic molecules such as illicit drugs and non-organo-nitrate explosives includes a heated surface and a collector electrode. A sample containing trace amounts of the organic molecules in ambient air is directe... | 06/20/1995 |
| 5389224 | Capacitive A/F sensor A sensor for determining the stoichiometric air to fuel ratio (A/F) at the intake of an internal combustion engine is based on a capacitive device in the exhaust stream which can be used to measure the change in the workfunction of an appropriate material... | 02/14/1995 |
| 5310474 | Workfunction based A/F sensor A sensor for determining the stoichiometric air to fuel ratio (A/F) at the input to the cylinders of an internal combustion engine which is based on measuring the change in the workfunction of a material which occurs when the oxidizing and reducing specie... | 05/10/1994 |
| 5275712 | Wide range workfunction based A/F sensor A sensor determines a wide range of air-to-fuel ratio values (A/F) about the stoichiometric A/F in a gaseous mixture which has oxidizing and reducing species as might be found in an automotive exhaust. The sensor includes a surface that serves simultaneou... | 01/04/1994 |
| 5028544 | Method of analysis of organic compounds in chromatography and apparatus for performing this method The objects of the invention are attained in an apparatus for performing a method of analysis of organic compounds in chromatography, comprising a chromatographic column sealingly connected with the housing of a surface ionization detector having coaxiall... | 07/02/1991 |
| 4902977 | Multipactor pressure gauge for use as a noninvasive vacuum tube sensor A gas ionization type vacuum gauge for testing the internal vacuum levels to below 10-6 torr is disclosed which uses a multipactor discharge means as the source for the electron current used to ionize residual gas molecules. The invention compr... | 02/20/1990 |
| 4839143 | Selective ionization of gas constituents using electrolytic reactions An ion mobility spectrometer, ionization detector and mass spectrometer is described having a reaction region, and means for introducing a sample gas, liquid or solid samples into the reaction region and an electrolyte in the reaction region of an alkali ... | 06/13/1989 |
| 4689574 | Electron impact ion source for trace analysis An apparatus is disclosed for analyzing trace elements in a gas sample. A unique feedback system is provided for accurately regulating and sensing the pressure supplied to the ion chamber of the device. The feedback system is capable of compensating for a... | 08/25/1987 |
| 4508685 | Modified-flame thermionic detector for gas chromatographs and method for the identification of components in sample under analysis The invention relates to a modified-flame thermionic detector for gas chromatographs, of the type including a burner nozzle, an excitation electrode and a collecting electrode. The electrical connections of the nozzle and the excitation electrode can be c... | 04/02/1985 |
| 4304997 | Electron capture detector with thermionic emission electron source An electron capture detector in which a thermionic source such as a filament provides electrons for the reaction in a source chamber having a port that connects to a detection chamber having a collector. Guard gas is introduced into the source chamber and... | 12/08/1981 |
| 4264817 | Coaxial electron capture detector with thermionic emission electron source An electron capture detector in which electrons for the reaction are supplied by a filament in a cylinder through which guard gas is passed. Apertures in the cylinder permit electrons from the filament to pass into an annular space surrounding the cylinde... | 04/28/1981 |
| 3949187 | Electron-beam evaporation apparatus An apparatus for electron-beam evaporation comprises a holding structure or support for the substance to be evaporated arranged alongside a hot cathode. A focusing and accelerating electrode is located adjacent the hot cathode and acts on the electrons em... | 04/06/1976 |
