| Patent Number |
Title Of Patent |
Date Issued |
| 4308081 |
Water-in-oil emulsion blasting agent |
December 29, 1981 |
| A water-in-oil emulsion explosive composition is provided containing sorbitan mono-oleate, sorbitan sesquioleate and glycerides of fatty acids as the emulsification agent and also containing a highly clorinated paraffinic hydrocarbon as an emulsification promoter. The presence of the |
| 4305859 |
Two-step copolymerization process by controlling the temperature to prepare copolymer latex cont |
December 15, 1981 |
| Improved process for the preparation of aqueous emulsions of addition copolymers having functional groups to provide thermosetting capability via condensation. The process improvement resides in reducing the amount of unwanted premature condensation of the functional group. The process |
| 4248576 |
Apparatus for coating thermoplastic film |
February 3, 1981 |
| A method and an apparatus for effecting in a continuous manner the three operations of extruding, biaxially stretching and surface coating a seamless tubing of thermoplastic resin such as polyethylene, polypropylene, polyethylene terephthalate, etc. The coating material in a molten s |
| 4248373 |
Explosive charge for explosive welding of large diameter metal pipe |
February 3, 1981 |
| A method is provided for the explosive welding together of sections of large diameter metal pipe of the kind used in the construction of high volume oil and gas pipelines. In the method, internal and external band charges of welding explosive are simultaneously detonated adjacent to |
| 4231506 |
Method of welding metal pipe sections with explosives |
November 4, 1980 |
| A method is provided for the explosive welding together of sections of large diameter metal pipe of the kind used in the construction of high volume oil and gas pipelines. In the method, internal and external band charges of welding explosive are simultaneously detonated adjacent to |
| 4218861 |
Apparatus for closing and sealing containers |
August 26, 1980 |
| An apparatus is described for handling a continuous, stuffed, flexible casing and especially stuffed with explosives material. The apparatus includes pairs of split necking plates on either side of a casing path adapted for opposed reciprocal movement for engaging the casing in the p |
| 4215027 |
Aqueous thermosettable coating compositions comprising aqueous copolymer latex, amine neutralize |
July 29, 1980 |
| Aqueous thermosetting coating compositions comprising a blend of (1) an aqueous latex of an acrylic copolymer, (2) an amine-neutralized acrylic copolymer, and (3) a melamine-formaldehyde resin. |
| 4213958 |
Production of sulphur trioxide, sulphuric acid and oleum |
July 22, 1980 |
| In a process for manufacturing sulphuric acid by catalytic conversion of gaseous sulphur dioxide to sulphur trioxide in the presence of dry air and under high pressure, the improvement comprising feeding the converted gas stream under high pressure to an absorbing unit, circulating essen |
| 4199262 |
Bulk explosive mixing and delivery apparatus |
April 22, 1980 |
| A mobile mixing and delivery apparatus for bulk slurry explosive compositions is provided. The apparatus comprises a vehicle body upon which is mounted a rotatable drum mixer. Explosive ingredients are fed into the mixer, mixed and then delivered close to the point of use where they |
| 4198253 |
Explosive compositions containing sulphonated guar gum derivatives |
April 15, 1980 |
| A slurry explosive composition is provided which has improved water resistance and thermal stability and resists segregation. The composition consists of an inorganic oxygen-supplying salt, a liquid carrier or solvent for the salt, a solid or liquid fuel and, as a thickener a sulfona |
| 4196073 |
Hydrophilic thio compounds as selective depressants in the flotation separation of copper and mo |
April 1, 1980 |
| A process for separating molybdenite from copper sulphide and other metal sulphide minerals with which it is associated in a metallurgical concentrate through use of a copper sulphide depressant which is a compound having at least one nitrogen atom, at least one thio group and at lea |
| 4162949 |
Reduction of steel cathode overpotential |
July 31, 1979 |
| The hydrogen overpotential of a steel cathode for use in the electrolysis of aqueous alkali metal solutions in diaphragm electrolytic cells is reduced by depolarization in a highly alkaline electrolyte. The reduction results in an appreciable reduction of the overall electrical energy |
| 4158943 |
Method and apparatus for placing a valve bag on a filling spout |
June 26, 1979 |
| Flexible plastic valve bags having a valve opening spaced from an edge of the bag are placed on filling spouts by first advancing the bag towards a filling spout on a carriage, and means are provided for blocking the communication of the valve opening with the body of the bag and means a |
| 4135450 |
Method of underground mining |
January 23, 1979 |
| A novel method of excavating underground chambers in strong rock is provided which is particularly suitable for use in stope and pillar mining operations. The method takes advantage of blasting techniques and specifically the use of large diameter spherical explosive charges by locat |
| 4130449 |
Thickened aqueous slurry explosive compositions |
December 19, 1978 |
| A thickened, aqueous slurry explosive composition containing a soluble organic nitrate sensitizer is provided which has improved rheological properties. Use in the composition as a thickener, of a mixture of an unmodified guar gum and a hydroxypropyl-modified guar gum provides a comp |
| 4124492 |
Process for the reclamation of waste hydrocarbon oils |
November 7, 1978 |
| Disclosed is a process for rejuvenating and reclaiming useful hydrocarbon oils from contaminated waste oils. The process comprises dehydrating the waste oil and thereafter dissolving the dehydrated oil in a selected amount of isopropanol or N-propanol at a temperature of from 45.degree. |
| 4006014 |
Use of tetraalkylammonium halides as flotation collectors |
February 1, 1977 |
| A process for the recovery of copper minerals from oxidized ores by flotation employing sulphidization of the oxidized minerals followed by flotation employing a tetraalkylammonium halide as collector. Preferably, a prior flotation step with a xanthate collector is employed, especially |
| 3942694 |
Bag severing machine |
March 9, 1976 |
| A machine for severing individual plastic bags from a length of bags joined by perforated junctures. The length of bags is extended and severed by the action of two spaced apart sets of rollers, each set grasping the bags, the second set rotating with a higher surface speed than the firs |
