Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 4634330 | Apparatus for introducing solids into a solids upflow vessel A solids feeder for transporting particulate solids from an elevated solids feed reservoir and introducing the solids upwardly into the bottom of a solids upflow vessel. The feeder includes a horizontally reciprocatable carriage supporting a vertical feed... | 01/06/1987 |
| 4586752 | Solution mining process A solution mining process for recovering mineral values from a subterranean mineral-bearing formation, which includes (1) a first injection-and-production phase during which a leaching solution is injected into the formation and a pregnant liquor is simul... | 05/06/1986 |
| 4432962 | Method for removing hydrogen sulfide from gas streams A hydrogen sulfide removal and conversion method in which a hydrogen sulfide-containing gas stream is contacted with a regenerable washing solution having a pH between about 5 and about 10 and containing solubilized vanadium, thiocyanate ions, a carboxyla... | 02/21/1984 |
| 4420938 | Geothermal power plant Useful energy is derived from steam flashed from hot geothermal brine having a tendency to deposit amorphous silica or calcite upon a reduction in the pressure or temperature of the brine. Steam condensate produced from the flashed steam is pressurized, a... | 12/20/1983 |
| 4414104 | Process for removal of metals from hydrocarbon oils A thiocyanate compound is added to metals-containing hydrocarbon oils under reaction conditions, and a product hydrocarbon of reduced metals content is separated from a metals-containing solid.... | 11/08/1983 |
| 4393936 | Method for the enhanced recovery of oil and natural gas A method for the enhanced recovery of both natural gas and liquid petroleum from hydrocarbon-containing subterranean formations, particularly dipping subterranean formations, by the consecutive steps of introducing a gaseous displacement fluid to recover ... | 07/19/1983 |
| 4358158 | Solution mining process Process for the solution mining of minerals from a subterranean formation in which a dilute carbonic acid leaching solution is injected through a first well into the formation and a pregnant liquor containing the dissolved minerals is recovered from a sec... | 11/09/1982 |
| 4358157 | Solution mining process Process for the solution mining of minerals from a subterranean formation using a dilute aqueous carbonic acid leaching solution and intermittent injection of an oxidizing agent.... | 11/09/1982 |
| 4327814 | Rotating eccentric weight apparatus and method for generating coded shear wave signals A rotating eccentric weight apparatus and method for generating coded shear wave signals for use in seismic exploration. The apparatus includes a rotatable eccentric and a position sensor capable of detecting each instant that the eccentric passes a parti... | 05/04/1982 |
| 4325936 | Method for removing hydrogen sulfide from gas streams A hydrogen sulfide removal and conversion method in which a hydrogen sulfide-containing gas stream is contacted with a regenerable washing solution containing solubilized vanadium thiocyanate ions, a carboxylate complexing agent and one or more water-solu... | 04/20/1982 |
| 4320788 | Apparatus for the bulk delivery of volatile liquids Apparatus for the bulk delivery of a volatile liquid including a mobile delivery vessel having at least one compartment for the bulk storage of the volatile liquid. Each compartment has a liquid outlet controlled by a remotely controllable liquid outlet v... | 03/23/1982 |
| 4315903 | Reducing the consumption of anthraquinone disulfonate in stretford solutions A process for treating a hydrogen sulfide-containing hydrogenated Claus process tail gas to convert the hydrogen sulfide to elemental sulfur in which said gas is contacted with an aqueous alkaline solution containing a water-soluble metal vanadate, a wate... | 02/16/1982 |
| 4304389 | Remote control apparatus for hydraulically actuated devices Apparatus including a manually operated electrical switch operably connected through electrical and pneumatic systems to a hydraulic system for remote manual control of hydraulically actuated devices, such as hydraulically actuated throttling valves. The ... | 12/08/1981 |
| 4302825 | Rotating eccentric weight apparatus and method for generating coded shear wave signals A rotating eccentric weight apparatus and method for generating coded shear wave signals for use in seismic exploration. The apparatus includes a rotatable eccentric and a position sensor capable of detecting each instant that the eccentric passes a parti... | 11/24/1981 |
| 4295773 | Apparatus and method for introducing solids into a solids upflow vessel A solids feeder and method for transporting particulate solids from an elevated solids feed reservoir and introducing the solids upwardly into the bottom of a solids upflow vessel. The feeder includes a stationary feed cylinder axially aligned with a bott... | 10/20/1981 |
| 4283379 | Method for removing hydrogen sulfide from gas streams A hydrogen sulfide removal and conversion method in which a hydrogen sulfide-containing gas stream is contacted with a substantially quinone-free aqueous washing solution containing, inter alia, solubilized vanadium, thiocyanate ions, and one or more wate... | 08/11/1981 |
| 4267893 | Dual-rotating eccentric drilling apparatus and method Apparatus and method for drilling a borehole in which an undersized drill bit mounted eccentrically within the borehole is rotated about its axis in engagement with the bottom of the borehole by means of a downhole motor while the drill bit is simultaneou... | 05/19/1981 |
| 4267887 | Method for acidizing high temperature subterranean formations Subterranean formations having temperatures above about 250° F. are acidized by introducing a substantially anhydrous foamed treating fluid through a well and into the formation. The treating fluid contains a gas, a nonionic substantially hydrophobic foa... | 05/19/1981 |
| 4261421 | Method for selectively acidizing the less permeable zones of a high temperature subterranean formation The less permeable zones of subterranean formations having temperatures above about 250° F. are acidized by selectively plugging the more permeable zones with acid-soluble particulate diverting agents and then injecting a substantially anhydrous acid pre... | 04/14/1981 |
| 4259300 | Integrated method for pollution abatement and energy derivation from geothermal steam An integrated method for the derivation of useful energy from steam containing both hydrogen sulfide and an alkaline acting component, such as ammonia, while substantially reducing the emission of sulfur-containing compounds to the atmosphere. Pretreatmen... | 03/31/1981 |
| 4258858 | Apparatus for sealing floating roof tanks An apparatus for sealing floating roof tanks including a sealing element disposed around the circumference of the floating roof between the floating roof and the tank wall, and a plurality of baffles adapted to substantially inhibit or prevent the circumf... | 03/31/1981 |
| 4249855 | Method for introducing solids into a solids upflow vessel A method for introducing particulate solids upwardly through a bottom solids inlet of a solids upflow vessel wherein after full extension of a piston to displace solids from a feed cylinder into the solids upflow vessel, the piston is partially retracted ... | 02/10/1981 |
| 4244190 | Process for integrating treatment of and energy derivation from geothermal brine A process for treating and deriving useful energy from a two-phase geothermal brine containing non-condensible gases, including hydrogen sulfide, and also containing heavy and/or transition metals in solution, wherein the non-condensible gases are separat... | 01/13/1981 |
| 4243648 | Method for removing hydrogen sulfide from gas streams A hydrogen sulfide removal and conversion method in which a hydrogen sulfide-containing gas stream is contacted with a regenerable washing solution capable of absorbing the hydrogen sulfide and converting the hydrogen sulfide to hydrophobic elemental sulf... | 01/06/1981 |
| 4243510 | Shale retorting process and apparatus Crushed oil shale is segregated into a major portion of relatively large particles and a minor portion of "fines," such as will pass through 1/8-inch screen openings. The large particles are subjected to retorting in an upflowing bed in countercurrent con... | 01/06/1981 |
| 4242012 | Method for constructing a multiseason ice platform An ice platform suitable for multiseason use is constructed in a cold offshore region by accumulating ice on a portion of a floating natural ice sheet until the ice mass formed thereby becomes grounded on the marine bottom. A rigid wall element is driven ... | 12/30/1980 |
| 4234053 | Seismic exploration method using a rotating eccentric weight seismic source A seismic exploration method in which a rotating eccentric weight seismic source is employed to transmit a coded energy signal into the earth. A position sensor mounted on the source directly detects the instants at which the rotating eccentric passes a p... | 11/18/1980 |
| 4224151 | Preventing scale deposition from geothermal fluids A method for preventing the deposition of sulfide and/or sulfate scale during the production of a hot two-phase geothermal fluid which contains hydrogen sulfide, barium heavy and/or transition metals, and at least a critical minimum amount of calcium in s... | 09/23/1980 |
| 4223399 | Seismic exploration method A seismic exploration method in which a coded energy signal is generated and transmitted into the earth, the seismic energy reflected from within the earth is sensed and sampled to form a raw trace, the raw trace is crosscorrelated with a record of the co... | 09/16/1980 |
| 4206194 | Reducing the consumption of anthraquinone disulfonate in stretford solutions A process for treating a hydrogen sulfide-containing hydrogenated Claus process tail gas to convert the hydrogen sulfide to elemental sulfur in which said gas is contacted with an aqueous alkaline solution containing a water-soluble metal vanadate, a wate... | 06/03/1980 |
| 4203492 | Method for acidizing siliceous materials contained in high temperature formations An aqueous fluoride salt solution and a substantially anhydrous acid precursor are introduced through a well into a high temperature subterranean formation containing siliceous materials. The acid precursor, which is a normally liquid halogenated hydrocar... | 05/20/1980 |
| 4201060 | Geothermal power plant A method for generating electricity wherein a geothermal fluid is produced from a moderate temperature hydrothermal formation and is used to supply sufficient sensible heat to preheat a working fluid, thereby cooling the geothermal fluid. The cool geother... | 05/06/1980 |
| 4200153 | Method for cementing high temperature wells A cement system including minor amounts of a carbon black cement additive admixed with cement is used to cement high temperature wells.... | 04/29/1980 |
| 4192630 | Method and apparatus for building ice islands Method and apparatus for building a thickened ice mass, such as a grounded ice island, at a cold offshore location, in which water is pumped through a fluid flow conduit and discharged from a rotating swing arm section of the conduit onto selected areas o... | 03/11/1980 |
| 4192375 | Gravel-packing tool assembly An improved gravel-packing tool assembly with a baffled stinger pipe for gravel-packing a perforate liner having substantially the same internal diameter as the casing string extending from the perforate liner to the earth surface. A perforate nipple and ... | 03/11/1980 |
| 4183682 | Motionless mixer and method for removing scaled mixing elements therefrom An inline motionless mixer for mounting in a fluid-conducting conduit having a removable housing which facilitates cleaning of the internal mixing elements.... | 01/15/1980 |
| 4161222 | Method for reducing contaminant emissions in gas drilling operations An improved gas drilling method for drilling a well through steam-bearing formations in which emissions of particulate material and other contaminants are reduced by imposing a surface back pressure on, and thereby reducing the velocity of, the contaminan... | 07/17/1979 |
| 4151260 | Hydrogen sulfide abatement in geothermal steam A process for reducing the hydrogen sulfide content of geothermal steam during a drilling operation by injecting hydrogen peroxide and an alkali metal hydroxide or calcium hydroxide into a flowing stream containing geothermal steam. Environmentally harmle... | 04/24/1979 |
| 4148360 | Method for acidizing high temperature subterranean formations Subterranean formations having temperatures between about 250° F. and about 700° F. are acidized by introducing a substantially anhydrous acid precursor through a well and into the formation, wherein the precursor hydrolyzes in situ to generate a hydroh... | 04/10/1979 |
| 4144715 | Method of producing mechanical energy from geothermal fluids A method for producing mechanical energy from geothermal fluids in which a heat transfer fluid (HTF) is heated by direct contact with the hot geothermal fluids, thereby partially cooling the geothermal fluids. A working fluid is heated by direct contact w... | 03/20/1979 |
