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| Number | Title | Issue Date |
| 7416698 | Molecular topological fractionation of macromolecules A process for characterizing a sample comprising a population of linear macromolecules of interest (104) and a population of long chain branched macromolecules of interest (103), the process including four steps. The first step is to provide a flow thr... | 08/26/2008 |
| 4935145 | On-line coupled liquid and gas chromatography system Apparatus and method for on-line coupled liquid chromatography and gas chromatography analysis includes a retention gap which allows injection of a substantial volume of sample-carrying eluent and concentrates bands, obviating adverse effects on the resol... | 06/19/1990 |
| 4917575 | Liquid chromatographic pump A liquid chromatographic method and apparatus is disclosed which employs an improved pump not requiring driven pistons or sliding seals. The pump comprises at least one length of tubing forming a chamber disposed between first and second check valves, con... | 04/17/1990 |
| 4850636 | Cartridge assmebly for a vehicle door, a vehicle door shell and a door assembly A method of assembling a door and a door assembly comprising an outer door shell and inner door supporting member therefor. The supporting member is hinged at one end to a door frame. The other end of the supporting member is slidably accommodated in and ... | 07/25/1989 |
| 4821303 | Combined thermal analyzer and x-ray diffractometer Scientific apparatus and a method are described for observing simultaneously both structural and thermodynamic properties of materials. An X-ray diffractometer and a thermal analyzer and mounted to cooperate and coact on the same sample and to complete a ... | 04/11/1989 |
| 4696904 | Apparatus and method for the determination of water by liquid chromatography The invention is the novel combination of liquid chromatographic separation of water from other components of an injected sample followed by electrochemical detection and quantitation of the separated water.... | 09/29/1987 |
| 4689152 | Apparatus and method for multistage membrane phase separation The invention relates to an apparatus and process for the separation of at least a portion of one liquid phase from a mixture of immiscible liquid phases using two porous membranes spaced from one another. Each membrane is wetted only by the one liquid ph... | 08/25/1987 |
| 4603812 | Foam-generating pump sprayer A hand-held apparatus for spraying foam comprises (a) a manually-operated dispensing pump capable of receiving a foamable liquid from a suitable container and ejecting it into the atmosphere through an atomizing nozzle, thereby forming a spray from such l... | 08/05/1986 |
| 4532811 | Apparatus for metering sub-10 cc/minute liquid flow Apparatus for accurately metering liquid flow based on the injection of a brief heat pulse into the flowing stream, e.g., via a miniature thermistor, and detection of an electronic time derivative of temperature downstream with, e.g., a second microprobe ... | 08/06/1985 |
| 4533643 | Method for the batch preparation of sample aliquots by solvent extraction and separation of solubles from nonsoluble particulate Method and apparatus for the batch preparation of sample aliquots by solvent extraction and separation of soluble species from sample comprising nonsoluble particulate, which comprises a receptacle which defines a sample receiving space into which a measu... | 08/06/1985 |
| 4532043 | Method for characterizing the molecular weight and molecular weight distribution of ultra-high molecular weight water soluble polymers The molecular weight and molecular weight distribution of diverse ultra-high molecular weight water soluble polymers is rapidly determined based on apparent size by passage of extremely dilute samples of the polymer (1-250 ppm) through a column of nonporo... | 07/30/1985 |
| 4527421 | Dynamic surface tensiometry and method An improved apparatus and method are disclosed for measuring the dynamic surface tension at a gas-liquid interface by the maximum bubble pressure method. The gas is bubbled out an orifice tube dipped in the liquid; the maximum pressure in each bubble is a... | 07/09/1985 |
| 4519905 | High performance analytical column for anion determination An improved chromatographic analytical column, the column containing a pellicular type (agglomerated) anion-exchange packing, comprising: Component A, which comprises a pressure packed bed of substrate particles of insoluble synthetic resin, having cation-exch... | 05/28/1985 |
| 4491024 | Method for metering sub-10 cc/minute liquid flow Method for electronically metering the flow of Newtonian liquids which comprises: (a) conveying the liquid to be metered through an electronic flow cell having a predetermined calibrated cell volume (Vc) and calibrated time constant (K); (b) in... | 01/01/1985 |
| 4474664 | Ion analysis method and apparatus A permselective ion-exchange membrane, preferably comprising hollow fiber(s) immersed within a regenerant, is used to selectively neutralize or suppress the conductivity of electrolyte in a stream of eluent also containing chromatographically separated io... | 10/02/1984 |
| 4463905 | Foam-generating pump sprayer A hand-held apparatus for spraying foam comprises (a) a manually-operated dispensing pump capable of receiving a foamable liquid from a suitable container and ejecting it into the atmosphere through an atomizing nozzle, thereby forming a spray from such l... | 08/07/1984 |
| 4459173 | Process for etching glass capillaries for chromatography An improved process for etching (eroding) the inner surface of a glass capillary column in which ammonium bifluoride in liquid methanol is passed slowly through the capillary bore for a prolonged period, followed by rinsing with methanol, thereafter a gra... | 07/10/1984 |
| 4451374 | Liquid chromatographic method and post-column effluent treatment for detection and separation at optimized pH Reagent is added to liquid chromatographic effluent to increase detection sensitivity of sample bands, or to enhance sensitivity with respect to interfering bands which overlap sample bands of interest, using one or more hollow fibers immersed within mobi... | 05/29/1984 |
| 4448691 | Liquid chromatographic method and apparatus with hollow fiber device for post-column derivatization Reagent is added to liquid chromatographic effluent to increase detection sensitivity of sample bands, or to enhance sensitivity with respect to interfering bands which overlap sample bands of interest, using one or more hollow fibers immersed within mobi... | 05/15/1984 |
| 4440603 | Apparatus and method for measuring dissolved halogens Liquids are monitored for dissolved halogens using amperometric detection based on the use of halogen specific electrodes of a conductive substrate on which is formed an adherent surface film of [Tix (Ru, Ir)1-x ]O2, where... | 04/03/1984 |
| 4414842 | Ion exchange chromatography with indirect photometric detection An improved technique for the measurement of ions in solution where the ions of interest are chromatographically displaced from an ion exchange column by an eluting ion which is or is made light-absorbing, and where the eluted sample ions, which are trans... | 11/15/1983 |
| 4406805 | Hydrated MgCl2 reversible phase change compositions A reversible liquid/solid phase change composition comprising hydrated MgCl2 and one or more of Ba(OH)2, Sr(OH)2, CaO, SrCO3, BaO, Ca(OH)2, Mg(OH)2, MgO, Na3 AlF6 or CaC | 09/27/1983 |
| 4402846 | Hydrated Mg(NO3)2 /MgCl2 reversible phase change compositions A reversible liquid/solid phase change composition comprising hydrated Mg(NO3)2 /MgCl2, and one or more of Sr(OH)2, Ca(OH)2, CaO or BaO, added to the composition in an effective amount to suppress sup... | 09/06/1983 |
| 4383047 | High performance anion-exchange chromatographic packing composition An improved pellicular type (agglomerated) anion-exchange chromatographic packing composition which comprises: Component A, a substrate which consists essentially of particles of insoluble synthetic resin, having cation-exchanging sites at least on their ... | 05/10/1983 |
| 4376641 | Coated capillary chromatographic column In the production of a wall coated open tubular capillary chromatographic column, improved deactivation of the inner surface of a glass or fused silica capillary tube prior to coating with stationary phase is obtained by a multi-step process whereby silox... | 03/15/1983 |
| 4242227 | Chromatographic column packing having a bonded organosiloxane coating Improved packings for columns useful in gas chromatography are made by a multistep process whereby polysiloxane molecules having various organic substituents are chemically bonded to the surface of a siliceous support. The process comprises one or more cy... | 12/30/1980 |
| 4238198 | Method for determining total inorganic sulfur A method for the determination of sulfur by which sulfur is reduced to volatile hydrogen sulfide gas and swept into a D.C. plasma where it is detected by vacuum ultraviolet atomic emission spectrometry at 180.7 nm. The method makes possible the determinat... | 12/09/1980 |
| 4166385 | Non-adiabatic reaction calorimetric technique A nonadiabatic calorimetric technique useful broadly for quantifying the reaction kinetics of thermally unstable solids is based on the distinguishing mode of establishing, under near steady state conditions, a thermal gradient across a reaction sample co... | 09/04/1979 |
| 4148610 | Batch preparation of samples by dilution In the automated, batch preparation of diluted samples, i.e., the preparation of sample/diluent aliquots of repetitively and exactly maintained fixed ratio, metered diluent is pneumatically introduced into a vented mixing chamber, using the principle of g... | 04/10/1979 |
| 4123931 | Method for uniformly coating liquid phases on glass beads and applications thereof A method is provided for uniformly coating a stationary liquid phase on glass beads, which are then suitable for use as chromatographic column packing, which comprises first contacting the beads with a first solution containing a suitable surfactant in an... | 11/07/1978 |
| 4120430 | Pump dispensing package A plastic bottle is formed with a relatively slim, handle-like extension, which is pivotally and flexibly joined to the bottle, and that serves as an actuator for a spray pump or pump dispenser mounted on the bottle. The actuator is positioned from the bo... | 10/17/1978 |
| 4109792 | Method of packaging and product made thereby Side gusseted industrial bags are continuously (or intermittently) formed from continuous web materials, and simultaneously filled and sealed in one fast operation by the method and apparatus of this invention. The various features of the invention includ... | 08/29/1978 |
| 4106261 | Method of forming, filling, and sealing scrim reinforced plastic bags A composite web comprised of free standing (non-blocked) plies is prepared with precisely even linear amounts of each ply, based on the principle of using a carrier ply of preferably heavy gauge plastic film. The carrier ply under controlled tension, is t... | 08/15/1978 |
| 4074504 | Method of forming filling and sealing an industrial size bag Side gusseted industrial bags are continuously (or intermittently) formed from continuous web materials, and simultaneously filled and sealed in one fast operation by the method and apparatus of this invention. The various features of the invention includ... | 02/21/1978 |
| 4073121 | Form, fill and seal industrial bag machine Side gusseted industrial bags are continuously (or intermittently) formed from continuous web materials, and simultaneously filled and sealed in one fast operation by the method and apparatus of this invention. The various features of the invention includ... | 02/14/1978 |
| 4066898 | Method and apparatus for monitoring amount of a substance applied to a fabric An apparatus and method based on X-ray transmission is disclosed for determining the thickness, or equivalently, the weight per unit area, of a substance containing atoms of a non-radioactive element of atomic number of 11 or greater applied to a fabric, ... | 01/03/1978 |
| 4009551 | Method and apparatus for registration of web material in forming filling and sealing industrial bags Side gusseted industrial bags are continuously (or intermittently) formed from continuous web materials, and simultaneously filled and sealed in one fast operation by the method and apparatus of this invention. The various features of the invention includ... | 03/01/1977 |
| 3990824 | Film size control apparatus for the blown film process Apparatus for regulating the flow of refurbishing gas or air internally to tubular film produced by the blown film process, comprising a pair of opposed arm means or arms adapted to physically contact and sense growth or diminishment in the size of the fi... | 11/09/1976 |
| 3976418 | Apparatus for gusseting continuous lengths of tubular material Moving tubing, such as of plastic film, is continuously gusseted in the longitudinal direction, by pulling apart opposed side sections of the tubing, at a local station by application of vacuum force selectively to the surface of the tube, leaving one or ... | 08/24/1976 |
| 3974947 | Dispensing carton for roll materials An improved foldably erected dispensing carton particularly for household wrapping materials such as polymeric film, wax paper, metal foil, and the like, wherein the carton embodies a double ply panel having a pressure sensitive adhesive layer interposed ... | 08/17/1976 |
