Quotables
"During my service in the United States Congress, I took the initiative in creating the Internet."
Al Gore ; The basis for the later misquote by US Republicans that Gore had "invented" the Internet. Gore was the leading political champion of the modern-day Internet.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5105652 | Compact separating system with snap-in columns A fluid separation system applicable to gas chromatography includes a separating column in the form of a coiled tube in a thermally insulated enclosure. The ends of the coiled tube are connected by snap-action couplings to the outlet of an injector and th... | 04/21/1992 |
| 5083450 | Gas chromatograph-mass spectrometer (GC/MS) system for quantitative analysis of reactive chemical compounds Described is a new gas chromatograph-mass spectrometer (GC/MS) system and method for quantitative analysis of reactive chemical compounds. All components of such a GC/MS system external to the oven of the gas chromatograph are programmably temperature con... | 01/28/1992 |
| 4982597 | Restrictor heating in supercritical fluid chromatography In a system for analyzing a chemical sample by chromatographic separation of said sample into components a method and apparatus are provided for heating the mobile phase to a desired temperature prior to exiting the restrictor, while maintaining the densi... | 01/08/1991 |
| 4967589 | Gas detecting device A gas detecting device includes a substrate, an insulator layer formed on the substrate, a gas sensitive layer formed the insulator layer, a pair of detection leads formed on the insulator layer, the gas sensitive layer partially overlying the pair of det... | 11/06/1990 |
| 4872334 | Variable flow capillary gas chromatography method A method for temperature programmed capillary column gas chromatography characterized in that carrier gas is flowed in an amount greater than that under normal separation conditions for a term starting from before injection of a sample or immediately afte... | 10/10/1989 |
| 4845985 | Supercritical fluid chromatography In a system for analyzing a chemical sample by chromatographic separation of said sample into components a method and apparatus are provided for maximizing detector resolution and minimizing duration by maintaining the linear velocity of the mobile phase ... | 07/11/1989 |
| 4805441 | Continuous air monitoring apparatus and method A continuous air monitoring apparatus utilizes a solid sorbent preconcentrator to concentrate airborne sorbent compounds for gas chromatographic analysis. Direct connection between the preconcentrator and gas chromatographic column allows direct desorptio... | 02/21/1989 |
| 4771628 | Chamber for chromatographic analyses This invention concerns a chamber for chromatographic analyses, in which capillary columns, in particular columns of fused silica, are thermally conditioned. The chamber comprises a thermally insulated space which can be perfectly sealed towards the outsi... | 09/20/1988 |
| 4541269 | Gas chromatograph detector A gas chromatographic detector for detection of compounds which fluoresce as a photo-response to light. The detector utilizes a remotely located light source for fluorescent excitation of a compound in a gas phase, and includes apparatus for the measureme... | 09/17/1985 |
| 4521225 | Instrument and process for testing landfill gas for chlorinated hydrocarbons A method for determining the concentration of chlorinated hydrocarbons in landfill gas by injecting a carrier gas and landfill gas containing chlorinated hydrocarbons through a valve and into a gas chromatographic column containing a column packing capabl... | 06/04/1985 |
| 4484061 | Temperature control system for liquid chromatographic columns employing a thin film heater/sensor A temperature control system for a liquid chromatographic column includes a thin film heater/sensor comprising a foil-like patterned heating element adhesively mounted between a pair of flexible electrically insulative layers. A patterned foil-like temper... | 11/20/1984 |
| 4432225 | Detection system for a gas chromatograph A method and apparatus are described for the quantitative analysis of vaporizable compounds, and in particular of polycyclic aromatic hydrocarbons which may be induced to fluoresce. The sample to be analyzed is injected into a gas chromatography column an... | 02/21/1984 |
| 4359891 | Repetitive chromatographic apparatus A repetitive gas chromatograph employing a backflush valve downstream from the detector and a separate sample injection valve located upstream located directly upstream from the single chromatographic column. Each valve is operated independently of the ot... | 11/23/1982 |
| 4351385 | Temperature control system for chromatographs A compact temperature-control unit for use with gas chromatographs. The unit includes a highly insulated enclosure with a removable lid having a gas chromatograph column wound on a thin-walled core fixedly positioned within the enclosure. Provisions are i... | 09/28/1982 |
| 4344917 | Sample inlet for analysis instrument and method of sample analysis A sample injection system for a gas chromatograph or other analysis instrument is described. The sample injection system can be used in conventional gas chromatographs containing a detecting device and an internal heat source to provide temperature-progra... | 08/17/1982 |
| 4305276 | Temperature controlled oven chamber for gas chromatography A temperature controlled oven chamber for gas chromatography incorporates a first stationary chamber wall, a second stationary chamber wall arranged remote from the first wall, and a displaceable chamber wall which is moveable between a closed position an... | 12/15/1981 |
| 4286456 | Gas chromatographic chamber A gas chromatographic chamber in the form of an oven is disclosed, including an outer envelope including insulated walls defining the chromatographic chamber which can be made air tight, an inner housing section within that chamber for housing the chromat... | 09/01/1981 |
| 4226112 | Method and apparatus for analyzing gases Apparatus and method for analyzing gases, especially respiratory gases for oxygen and carbon dioxide content, and for measuring pulmonary functions; such comprising a detector employing thermistors forming parts of a Wheatstone bridge circuit, one of whic... | 10/07/1980 |
| 4204423 | Chromatograph An apparatus for gas and liquid chromatograph in which the chromatographic columns are heated by microwaves is provided.... | 05/27/1980 |
| 4186295 | Control system for a chromatography apparatus oven door In a gas chromatography system of the type including an oven for the GC column, and an electric heater for controllably heating the oven; an improved system is disclosed for controllably opening and closing the oven door to enable a fully controlled heat ... | 01/29/1980 |
| 4181613 | Venting method for a chromatograph oven An oven for a chromatograph is shown in which intake and exhaust ports are both located on the opposite side of the fan from the columns, and in such manner that ambient air entering through the intake port merges with hot air from the oven before reachin... | 01/01/1980 |
| 4176542 | Analysis instruments Analytical devices such as chromatographs are disclosed wherein an intrinsically safe source of electrical energy is used to heat analytical elements of the devices, and optionally to power other circuits of the device.... | 12/04/1979 |
| 4096908 | Heating and cooling enclosure for a gas chromatographic column The enclosure comprises an insulating and demountable sealed box unit fitted with a closure lid and placed around a chromatographic column consisting of a metal tube of constant cross-section, said tube being arranged in the form of a helix and supplied w... | 06/27/1978 |
| 4089207 | Accessory for gas concentrator-gas chromatograph analyzer An accessory for a gas concentrator-gas chromatograph system including a split heater block hinged to expose a channel shaped to receive a concentrator column. Quick detachable gas connections are aligned with the block channel facilitating rapid and conv... | 05/16/1978 |
| 4088458 | Heater block for low cost gas chromatograph In a gas chromatograph assembly, a heat conducting block of relatively large mass has a plurality of cavities formed therein. One cavity houses the chromatographic column; another cavity, extending into close proximity to the first, houses a temperature s... | 05/09/1978 |
| 4072846 | Control system for a chromatography apparatus oven door In a chromatography system of the type including an oven for the chromatographic column, and an electric heater for controllably heating the oven, an improved system is disclosed for controllably opening and closing the oven door to enable a fully control... | 02/07/1978 |
| 4070169 | Chromatographic column oven In a chromatographic column oven, a particular arrangement of a fan, heater and baffles provides low thermal gradients and rapid oven cool-down. Low thermal gradients are obtained by providing an air circulation pattern that promotes optimum mixing of the... | 01/24/1978 |
| 4059994 | Pneumatic chromatograph An all-pneumatic process chromatograph having a pneumatically-actuated sample-injection valve, an orifice connected in the column output line to develop a pressure signal corresponding to fluid density, a pneumatic amplifier for strengthening the pressure... | 11/29/1977 |
| 4057998 | Chromatograph, more particularly for gas phase chromatography This chromatograph comprises a modular enclosed space having compartments, with temperature controlling means arranged in said compartments, such as an electrical resistance and a blower, for providing a uniform temperature. Removable function modules are... | 11/15/1977 |
| 4050911 | Gas chromatograph oven A method for cooling gas chromatograph ovens with ambient room temperature air utilizing two separate air passages through an oven door. The door remains closed during the heating and cooling cycles which take place inside the oven housing. A rotating sti... | 09/27/1977 |
| 4044593 | Chromatograph A chromatograph having removable modular analysis units fitting into a chamber within the chromatograph housing, each unit including a column, sample introduction portion and detector. Each modular unit includes a block of thermally conductive material wh... | 08/30/1977 |
| 4004881 | Apparatus for generating carrier gas-test specimen vapor mixtures for delivery into a gas chromatograph Delivery of a test specimen vapor--carrier gas mixture into a gas chromatograph is accomplished by means of an apparatus including a barrel to receive a probe which serves to maintain the test specimen in contact with carrier gas within the barrel, a heat... | 01/25/1977 |
