Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 4936932 | Aromatic hydrocarbon-based emulsion explosive composition An emulsion explosive composition comprising a discontinuous oxidizer phase and a continuous fuel phase is provided wherein the fuel phase comprises an aromatic hydrocarbon compound. The composition essentially contains as the emulsifying agent a polyisob... | 06/26/1990 |
| 4936931 | Nitroalkane-based emulsion explosive composition An emulsion explosive composition comprising a discontinuous oxidizer phase and a continuous fuel phase is provided wherein the fuel phase comprises a nitroalkane compound. The composition essentially contains as the emulsifying agent a polyisobutylene su... | 06/26/1990 |
| 4917765 | Vesiculated polymer granules Vesiculated granules of cross-linked carboxylated polyester resin prepared by the free radical polymerization of a dispersion of an ethylenically unsaturated monomer, a carboxylated unsaturated polyester resin having an acid value of from 5-50 mg KOH/g an... | 04/17/1990 |
| 4915785 | Single stage process for bleaching of pulp with an aqueous hydrogen peroxide bleaching composition containing magnesium sulphate and sodium silicate A rapid, single stage process for the bleaching of high yield lignocellulose pulp (mechanical pulp) to enhanced brightness levels with hydrogen peroxide in the presence of magnesium sulphate and sodium silicate, with a substantial reduction in the wastefu... | 04/10/1990 |
| 4898066 | Polymeric film enveloped explosive cartridges and their manufacture and use An improved plastic film cartridge for flowable explosives is provided. The cartridge comprises a recessed or indented end configuration which recess can be enlarged to provide a locating and retaining pocket for a blasting cap without any penetration of ... | 02/06/1990 |
| 4872408 | Polymeric film-enveloped explosive cartridges and their manufacture and use An improved plastic film cartridge for flowable explosives is provided. The cartridge comprises a recessed or indented end configuration which recess can be enlarged to provide a locating and retaining pocket for a blasting cap without any penetration of ... | 10/10/1989 |
| 4829902 | Method for charging flowable explosives into upwardly extending boreholes A method is provided for loading upwardly extending boreholes in rock with flowable bulk explosives. An explosives loading pipe, an air exhaust pipe and an initiating booster charge with associated initiator are located in the borehole so that the booster... | 05/16/1989 |
| 4826881 | Vesiculated polymer granules Vesiculated granules of cross-linked carboxylated polyester resin prepared by the free radical polymerization of a dispersion of an ethylenically unsaturated monomer, a carboxylated unsaturated polyester resin having an acid value of from 5-50 mg KOH/g an... | 05/02/1989 |
| 4808633 | Vesiculated polymer granules Vesiculated granules of cross-linked carboxylated polyester resin prepared by the free radical polymerization of a dispersion of an ethylenically unsaturated monomer, a carboxylated unsaturated polyester resin having an acid value of from 5-50 mg KOH/g an... | 02/28/1989 |
| 4805674 | Natural gas storage and retrieval system A natural gas storage and retrieval system which comprises natural gas storage means adapted to receive and store natural gas under pressure and a natural gas displacing liquid under pressure; means for feeding natural gas under pressure to said natural g... | 02/21/1989 |
| 4804528 | Stripping and recovery of dichromate in electrolytic chlorate systems A process for removing dichromates from chlorate-rich solutions containing hypochlorite and dichromate ions and produced by the electrolysis of brine. The dichromate is reduced in a two-stage process by the addition of ammonia under controlled conditions ... | 02/14/1989 |
| 4796748 | Continuous bucket conveyor system A continuous bucket conveyor/elevator is provided which comprises a series of buckets mounted on at least one endless cable. The cable or cables and attached buckets are urged forward by means of an adjacent driving mechanism, such as, a pneumatic or hydr... | 01/10/1989 |
| 4768127 | Ignition system A plurality of electric blasting caps are fired through the ignition system which includes a transformer having a primary winding and a secondary winding. The secondary winding of the transformer is connected to the resistive elements of the blasting caps... | 08/30/1988 |
| 4718953 | High explosive compound in nitrate salt matrix A novel heterogeneous, cap-sensitive high explosive is provided which comprises a crystalline inorganic nitrate salt having dispersed throughout the matrix of the salt crystal a hydroxyalkyl nitrate fuel. Particularly preferred are ammonium nitrate crysta... | 01/12/1988 |
| 4713232 | Process for the destruction of by-product tetranitromethane A process for the management of by-product tetranitromethane (TNM) which avoids the hazards of the prior art isolation or extraction procedures. A selected in-plant liquid or vapor stream, or a reactor off-gas stream from nitration or nitric acid oxidatio... | 12/15/1987 |
| 4702805 | Production of sodium chlorate Process for the production of sodium chlorate by the electrolysis of sodium chloride contaminated with sodium sulphate wherein the sulphate concentration in the system is kept below a pre-selected level. A portion of the mother liquor remaining after crys... | 10/27/1987 |
| 4690058 | Smooth wall blasting in rock A method of smooth wall rock blasting is provided in which an alignment of boreholes for explosive charging is drilled into rock and a single, smaller diameter empty borehole is drilled close and parallel to, and on each side of each charged borehole. Upo... | 09/01/1987 |
| 4689096 | Explosive booster composition A packaged booster charge is provided which is sensitive to initiation by blasting cap yet which contains no self-explosive ingredient. The composition of the booster comprises a low melting point nitrate salt or salt mixture having dissolved or finely di... | 08/25/1987 |
| 4681781 | Shipping bag A thermoplastic heavy duty shipping bag having walls formed of cross-laminated outer plies of uni-axially oriented polyethylene and inner walls of low density polyethylene, heat sealed thereto. The bag provides improved puncture and snag resistance.... | 07/21/1987 |
| 4680207 | Thermoplastic sack A cold-drawn unbalanced biaxially oriented linear low density polyethylene film having a transverse direction draw ratio selected from greater than 1 to less than 3 and a machine direction draw ratio of less than 6 but greater than the transverse directio... | 07/14/1987 |
| 4677007 | Thermoplastic sack A shipping sack having walls formed of uni-axially oriented linear low density polyethylene film wherein said film is produced by blowing and cold drawing said polyethylene at a draw ratio to blow ratio of greater than 1:1, preferably, between 2:1 and 5:1... | 06/30/1987 |
| 4673560 | Generation of sulphur trioxide from oleum using microwave energy Process and apparatus for the generation of sulphur trioxide from oleum using microwave energy for use in the sulphonation and nitration of organic compounds and the fortification of oleum. The process provides improved control of production and concentra... | 06/16/1987 |
| 4671952 | Vaporizing liquid sulfur dioxide with microwave radiation Process and apparatus for the generation of sulphur dioxide vapor from contaminated liquid sulphur dioxide. The process allows of utilization of contaminated liquid sulphur dioxide and comprises subjecting liquid sulphur dioxide feed to microwave energy f... | 06/09/1987 |
| 4671951 | Purification and reconcentration of waste sulphuric acid This invention relates to a process for the production of concentrated sulphuric acid from waste sulphuric acid which comprises subjecting said waste acid to microwave energy for a sufficient period of time to effect production of water vapor, whereby sai... | 06/09/1987 |
| 4663142 | Generation of sulphur trioxide from oleum A continuous process for the generation of sulphur trioxide from oleum suitable for use in the sulphonation of organic compounds which comprises continuously introducing oleum feed to a sulphur trioxide desorption tower; continuously introducing a recycle... | 05/05/1987 |
| 4654205 | Sulphur trioxide absorption apparatus and process An absorption tower for absorbing sulphur trioxide in sulphuric acid having distinct upper and lower packed absorption zones wherein substantially all of the sulphur trioxide is absorbed by the sulphuric acid in the lower zone, while in the upper zone the... | 03/31/1987 |
| 4636715 | Digital display ohmmeter An apparatus and method is provided for measuring the continuity and resistance of electric circuits, particularly electric wire circuits used in blasting, in the presence of spurious voltages due to galvanic currents. A constant current from a cell is pa... | 01/13/1987 |
| 4622921 | Combined sulphur burning furnace and boiler A combined sulphur burning furnace and water-cooled boiler arrangement for producing a cooled, gaseous sulphur dioxide-air mixture in which the furnace is located below the boiler tubes arrangement in a vertical, cylindrical shell. The hot gases produced ... | 11/18/1986 |
| 4591495 | Method and apparatus for making sulphuric acid In a system using the double absorption process for sulphuric acid manufacture, a single acid circulation system and a single cooler are employed. Acid from the exit of the air drying tower and final absorber tower are mixed in a common reservoir, while a... | 05/27/1986 |
| 4578262 | Liquid sulphur dioxide manufacture Process for the production of liquid sulphur dioxide in a sulphur dioxide facility forming part of a sulphuric acid plant wherein a portion of the sulphur dioxide produced in a sulphur burning furnace is directed to a sulphur dioxide liquefaction means an... | 03/25/1986 |
| 4576844 | Shipping bag A thermoplastic heavy duty shipping bag having walls formed of cross-laminated outer plies of uni-axially oriented polyethylene and inner walls of low density polyethylene, heat sealed thereto. The bag provides improved puncture and snag resistance.... | 03/18/1986 |
| 4547353 | Apparatus and processes for the concentration of sulphuric acid A process for producing concentrated sulphuric acid from a hot gas stream comprising water and sulphur trioxide which process comprises feeding a first portion of said gas stream through a first sulphur trioxide absorption zone and a second portion throug... | 10/15/1985 |
| 4539909 | Detonating assembly with U-bend of low energy detonating cord A non-electric detonator assembly is provided for initiation by means of a connected length of low energy detonating cord. The assembly comprises a substantially conventional instantaneous or delay period non-electric blasting cap containing a detonating ... | 09/10/1985 |
| 4522125 | Charging large diameter vertical boreholes A method of charging upwardly extending, large diameter boreholes with cylindrical explosive cartridges is provided employing a longitudinally inflating flexible tube as the pushing mechanism. A fluid-impervious flexible tube is turned over or everted at ... | 06/11/1985 |
| 4519314 | Borehole charging method including toroidal transformer cores A method of charging a borehole with a column of explosives is described wherein the explosive charge is detonable in time-delay sequence by means of electrically initiated detonators. The method requires providing a loop of an insulated electrical conduc... | 05/28/1985 |
| 4514318 | Stabilizing polysaccharide-thickened aqueous medium and stable aqueous gel A means is provided for stabilizing polysaccharide-thickened aqueous solutions by including in the thickened solution from 0.01% to 1% w/w of a thiuram sulphide or thiomorpholine compound as stabilizer. These stabilizers provide improved resistance agains... | 04/30/1985 |
| 4495161 | Energy recovery method and system for combined sulphuric acid and phosphoric acid manufacturing plant In conventional processes for manufacturing phosphoric acid, sulphuric acid is reacted with phosphate rock to produce weak phosphoric acid which is concentrated using steam from the associated sulphuric acid manufacturing operation. Low grade heat from th... | 01/22/1985 |
| 4492165 | Expandable explosive and stemming cartridge An explosive or stemming package is provided which is self-retaining in vertical or inclined up-holes in stable rock. The package containing a flowable material, for example, slurry explosives, consists of a thin-walled cylindrical bag having at least one... | 01/08/1985 |
| 4472215 | Continuous method and apparatus for the preparation of explosives emulsion precursor A process and apparatus is provided for the continuous manufacture of a water-in-oil explosive emulsion precursor. Separate streams of the water phase component and the oil phase component are introduced into an in-line motionless mixer. A chosen portion ... | 09/18/1984 |
| 4470855 | Water-in-wax emulsion blasting agents A water-in-wax emulsion explosive composition is provided wherein the continuous carbonaceous fuel phase comprises paraffin wax together with a minor amount of a rheology modifier and stabilizer combination comprising an ethylene-containing polymer and a ... | 09/11/1984 |
