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| Patent # | Description |
|---|---|
| US-4,255,266 |
Water purification process In a biological water purification process polluted water, including surface water to be made potable, sewage water or industrial water, is percolated through a... |
| US-4,255,265 |
Reusable coffee filter This invention relates to a permanently useable coffee filter comprising a funnel-shaped container, of which the base is provided with at least one outlet... |
| US-4,255,264 |
Rotary drum or disc filter In a rotary drum or disc filter having circumferentially distributed cells in constant communication through open outlets with a common vacuum chamber, which may... |
| US-4,255,263 |
Stacked assembly for reverse osmosis The stack assembly (FIG. 9) is formed by identical plates (P) of rectangular shape alternating with semi-permeable membranes (12). A face of each plate is formed... |
| US-4,255,262 |
Hydraulic powered mixing apparatus Mixing apparatus includes a tank having an upright draft tube extending from above an operating level of liquid contained in the tank to a level near the bottom... |
| US-4,255,261 |
Separation drum for belt filter with suction recovery of solids A separation drum for suction recovery at high concentration of fine particles, such as algae, removed from dilute liquid medium by a belt filter has a thin,... |
| US-4,255,260 |
Waste disposal system A waste disposal system provides a mixing stage where waste matter is water-charged, the water charged mixture is then steam exploded by being sprayed onto a... |
| US-4,255,259 |
Scale inhibition This invention relates to an improved method for inhibiting deposition of scale in aqueous systems. More specifically, it relates to the use of small quantities... |
| US-4,255,258 |
Filtration of a coal liquid slurry using an alkylmethacrylate copolymer
and an alcohol The rate of filtration of a coal liquid slurry is increased by adding an alkylmethacrylate copolymer and an alcohol containing 2 to 10 carbon atoms to the slurry... |
| US-4,255,257 |
Process for the treatment of water In a process for the treatment of water with ozone a partial current of treated water is contacted under pressure in a packed column with an oxygen-ozone mixture... |
| US-4,255,256 |
Medium for the separation of human blood leucocytes A rapid one-step density separation method for separating and purifying whole blood into mononuclear and polymorphonuclear leucocyte and erythrocyte fractions... |
| US-4,255,255 |
Tubular membrane separation process and apparatus therefor An apparatus and process for tubular membrane separation, such as reverse osmosis or ultrafiltration, with an arrangement for removing undesirable deposits from... |
| US-4,255,254 |
Delayed counterweight vibrator apparatus An improved apparatus for vibrational conveyance, e.g., for sifting, cleaning or screening bulk or particulate material. The apparatus includes: (a) a frame; (b)... |
| US-4,255,253 |
Hydrogen processing of hydrocarbon feeds using coated catalysts Catalysts consisting of a base support having a strongly adherent outer coating of an active catalytic material have been found to give superior results in known... |
| US-4,255,252 |
Procedure for the reprocessing of used lubricating oils A method for reprocessing used lubricating oils is disclosed wherein the oil is dried, treated with finely dispersed sodium metal at elevated temperature, the... |
| US-4,255,251 |
Hydrocracking process and catalyst A hydrocracking process for the conversion of heavy hydrocarbon oils and a catalyst therefore which comprises a hydrogenating component and a cracking component... |
| US-4,255,250 |
Extended cycle regenerative reforming A multiple zone catalytic reforming process in which the C.sub.5 + yield or the catalyst run length in all reaction zones downstream of the first is increased by... |
| US-4,255,249 |
Process for production of oil from oil sand A process for the production of oil from oil sand includes adding cyclodextrin or a starch decomposition product containing cyclodextrin to oil sand to convert... |
| US-4,255,248 |
Two-stage coal liquefaction process with process-derived solvent having
a low heptane-insolubiles content Disclosed is a two-stage process for the production of clean liquid hydrocarbons from coal. In the process subdivided coal is dissolved in a process derived... |
| US-4,255,247 |
Electrode An electrode is prepared by etching an alloy substrate comprising a first metallic component selected from the group consisting of chromium, manganese, tantalum,... |
| US-4,255,246 |
Electrolytic cell for chlorine production The present invention relates to a method and electrolytic cell for making hypochlorous acid (HClO) by electrolysis of an aqueous chloride solution circulating... |
| US-4,255,245 |
Electrolysis cells The electrolysis cell, e.g. for use in the construction of an electrolyzer for the production of hydrogen on an industrial scale, comprises an alternate series... |
| US-4,255,244 |
Shrink tube liquid junction structure for electrochemical electrodes A liquid junction structure for an electrochemical reference electrode or a reference portion of an electrochemical combination electrode comprising an element... |
| US-4,255,243 |
Unsaturated poly-(carbonate-urethanes) and their applications to
photocrosslinking The invention relates, by way of new products, to poly-(carbonate-urethanes) with acrylic or methacrylic acid terminal groups, of the formula ##STR1## ... |
| US-4,255,242 |
Reference electrode IR drop corrector for cathodic and anodic protection
systems In making measurements of the potential of a structure immersed in an electrolyte, which structure is being protected from corrosion by a cathodic or anodic... |
| US-4,255,241 |
Cathodic protection apparatus and method for steel reinforced concrete
structures A cathodic protection system and method for steel reinforcement in concrete structures such as bridge decks, parking garage decks and highways utilizes... |
| US-4,255,240 |
Ion-exchange structures of copolymer blends Ion-exchange films, membranes and laminar structures incorporating a layer of a blend of a first fluorinated polymer which contains sulfonyl groups in ionizable... |
| US-4,255,239 |
Method for making tinned steel plate free from surface graphite A method of producing steel strip having a metal coating layer including the steps of (a) cold rolling a hot-rolled steel strip, (b) cleaning the cold rolled... |
| US-4,255,238 |
Method of control for an electrolytic display cell and especially a cell
of the metal halide type and a circuit... The electrolytic display cell comprises a plurality of electrodes having suitable shapes for character display, a counter-electrode and an electrolyte. A... |
| US-4,255,237 |
Method for producing a nozzle body by electroforming A method for producing, by electroforming, a nozzle body having an inner ket surface whose slope can be made variable and, in particular, can be formed to... |
| US-4,255,236 |
Reactor and fuel assembly design for improved fuel utilization in liquid
moderated thermal reactors An improved reactor and fuel assembly design is disclosed wherein a light water reactor is initially run with undermoderated fuel assemblies to take advantage of... |
| US-4,255,235 |
Device for measuring the flow rate of cooling fluid at the inlet of the
core of a water-cooled reactor The invention relates to a device for measuring the flow rate of cooling fluid at the inlet of the core of a water-cooled reactor. The device comprises a base secured... |
| US-4,255,234 |
Automatic flux mapping system In a nuclear reactor flux mapping system consisting of two operationally independent electronic subsystems for controlling the positioning of separate groups of... |
| US-4,255,233 |
Use of polyacrylic acid in pulp bleaching processes to preserve pulp
strength and aid in brightness Improved pulp strength and brightness of chemically produced pulp can be obtained by treating the pulp with the addition of 0.05--0.5% based on the weight of the... |
| US-4,255,232 |
Method for drying sludge Pasty, aqueous sludges of industrial or sewage treatment origin are dried for further use as raw material. The sludge particles are loosened by intense motion... |
| US-4,255,231 |
Carpet etching Multi-level nylon pile fabrics having a selectively etched surface and a process of developing an etched effect that comprises selectively applying a chemical... |
| US-4,255,230 |
Plasma etching process In an improved process for the etching of polysilicon substrates, a polysilicon substrate is exposed to plasmas of carbon tetrachloride, chlorinated gas,... |
| US-4,255,229 |
Method of reworking PROMS PROM wafers having fuses on raised oxide are reworked by stripping the fuses and connectors, non-selectively etching the oxide layer to form a substantially... |
| US-4,255,228 |
Method of growing quartz Quartz is grown from a quartz seed material by depositing electrodes onto the seed, heating the seed to about 500 degrees C. while applying an electric field... |
| US-4,255,227 |
Apparatus for forming laminated fabrics A machine for bonding a layer of olefin yarn to a preference layer of nonwoven olefin material to form a laminated fabric is described. The machine includes an... |
| US-4,255,226 |
Devices for aiding the preparation of graphic artwork A device for supporting and guiding a master sheet in relation to an item of artwork comprises a carrier in the form of a rectangular frame having means for... |
| US-4,255,225 |
Combined heat sealer and cut-off device This relates to a device for pinching off a length of a continuous tube and heat sealing the same, together with a cutting off of the closed end tube portion. A... |
| US-4,255,224 |
Machine for the manufacture of brushes A machine for the manufacture of brushes having at least one brush head mounting structure for brush heads. The mounting structure is pivotal about two axes and... |
| US-4,255,223 |
Method and apparatus for producing a collapsibly foldable packaging
sleeve having a polygonal cross-section This invention relates to packaging "sleeves", or multi-sided, tubular structures which may be used for packaging articles, as blanks for boxes, or the like,... |
| US-4,255,222 |
Apparatus for splicing thermoplastic yarns A hand-held splicing device for melt butt splicing thermoplastic yarns or tapes together. The splicing device comprises two-yarn clamping means, a diagonally ... |
| US-4,255,221 |
Surfboard and method and apparatus for making surfboards and like molded
structures A surfboard having a central core of relatively soft and/or light material such as balsa wood or foamed plastic and a laminated outer skin construction is... |
| US-4,255,220 |
Method for supplying a label to an article surface A label applicator comprising a supporting structure and a label receiver mounted on the supporting structure for movement between a retracted position and an... |
| US-4,255,219 |
Process for making composite laminated polyamide sheet material A thermoplastic sheet material useful in forming multilayer composites, said sheet material being formed of at least one layer comprising polyepsiloncaprolactam... |
| US-4,255,218 |
Method and apparatus for applying adhesive strip A device for applying a portion of a strip of adhesive releasably carried on a liner to one surface of a member. The device comprises a platen of a firm material... |
| US-4,255,217 |
Method of forming an embossed decorative surface covering A method of forming an embossed decorative surface covering having a backing material and a plastic-type surface material. A layer of liquid plastic-type... |
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