| Patents for E21C 50 - Obtaining minerals from underwater, not otherwise provided for (408) |
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| 05/07/2008 | CN100386500C Method and device for extracting natural gas hydrate |
| 04/17/2008 | US20080088171 Mining methane, sequestering carbon dioxide and farming in oceans |
| 01/15/2008 | US7318627 Recovery head with track seal |
| 10/10/2007 | CN101050706A Automatic sand-stone loading and unloading machine system |
| 10/10/2007 | CN101050697A One dimension production analogue test device for natural gas hydrate |
| 10/03/2007 | CN101046146A Simulating experiment equipment for 2D exploitation of natural gas hydrate |
| 09/19/2007 | CN101037938A Method for mining gas hydrate using solar heating and device |
| 09/12/2007 | CN101033690A Deep-sea mineral mining equipment |
| 08/15/2007 | CN101016841A Method for exploiting natural gas hydrates and device thereof |
| 07/10/2007 | US7241077 Underwater installation apparatus |
| 07/05/2007 | WO2007075035A1 Blaster and blasting a method of underwater base rock |
| 06/21/2007 | DE10227951B4 Verfahren zur Steuerung der Wasserqualität an offenen Gewässern Method for controlling water quality in open waters |
| 04/11/2007 | CN1944958A Multifunction sand recovering and beating machine |
| 04/11/2007 | CN1944950A Method for recovering sea bottom hydrate by underwell gas and water separation and back injection |
| 04/11/2007 | CN1944949A Method for recovering sea bottom hydrate by single well heat injection circulation |
| 02/28/2007 | CN1920251A Method and device for natural gas hydrate exploitation with in-situ catalytic oxidation thermochemistry method |
| 07/26/2006 | CN1807836A Dispersed deep-sea partial trial-mining system |
| 07/11/2006 | US7073868 Optimized kinetic energy machine for excavating underwater rock |
| 06/14/2006 | CN1786416A Method for extracting hydrate on bottom of sea by deep earth heart water circulation |
| 04/12/2006 | CN1757882A Extracting and conveying method and device of sea-bottom natural gas hydrate |
| 04/12/2006 | CN1757879A Comprehensive experimental system of hydrate exploitation technology |
| 11/17/2005 | DE102004045680B3 In-situ incubator for isolating sediment cores from the environment and transporting them to the surface consists of pipette tube and injection unit that can accommodate several syringes that can be emptied by force of motor |
| 11/02/2005 | CN1690360A Method and system for exploiting seabed natural gas hydrates |
| 10/06/2005 | WO2005093215A1 Collecting and lifting methods of manganese nodule and mining device |
| 08/25/2005 | DE102005004353A1 Unterwasser-Installationsvorrichtung Underwater installation device |
| 08/04/2005 | US20050167117 Underwater installation apparatus |
| 06/29/2005 | CN2706582Y Aggregate digging magnetic separation ship |
| 06/29/2005 | CN1632286A High pressure water cutting refuse mine valuable metals recovering process and equipment thereof |
| 06/08/2005 | CN1624296A Method and device for extracting natural gas hydrate |
| 03/23/2005 | CN2687337Y Sand-washing mechanism for sand collecting boat |
| 03/02/2005 | CN1587642A Method and device for sea natural gas hydrate production |
| 03/02/2005 | CN1587641A Method and device for sea natural gas hydrate production |
| 03/02/2005 | CN1587640A Method and device for sea natural gas hydrate production and drilling |
| 03/02/2005 | CN1191423C Movable distributive continuous exploitation method for deep sea mineral resources |
| 12/21/2004 | US6832465 Aquatic weeding device |
| 11/16/2004 | US6817427 Device and method for extracting a gas hydrate |
| 09/15/2004 | CN1529039A Apparatus and proless for extracting sandy soil from sea bottom deep sand layer |
| 04/29/2004 | US20040079003 Aquatic weeding device |
| 01/29/2004 | WO2004009958A1 Apparatus and method for collecting underground hydrocarbon gas resources |
| 11/26/2003 | CN1458391A Movable distributive continuous exploitation method for deep sea mineral resources |
| 10/22/2003 | CN1125215C Hydraulic lifting method and apparatus for submaring mineral |
| 07/24/2003 | US20030136585 Device and method for extracting a gas hydrate |
| 04/16/2003 | EP0958446B1 Method and device for driving bore-holes, specially for prospection and extraction drillings |
| 11/26/2002 | US6484820 Method and device for driving bore-holes, especially in the sea bed, using a guide tip |
| 04/17/2002 | CN1344844A Hydraulic lifting method and apparatus for submarine mineral |
| 12/06/2001 | DE10027415A1 Offshore sea bed oil production comprises separation of water, gas and hydrocarbons which are difficult to exploit, sending only valuable light crude for onshore processing |
| 10/09/2001 | US6299256 Method and apparatus for recovering a gas from a gas hydrate located on the ocean floor |
| 05/09/2001 | CN1294648A Method for extracting methane hydrate on ocean floor |
| 04/05/2001 | WO2001023709A1 Position determining device and method |
| 04/05/2001 | CA2385762A1 Position determining device and method |
| 10/26/2000 | DE19917946A1 Ignition method for explosive material using fluid jet cutting is based on determination of which thermodynamic, kinematic and dynamic conditions lead to ignition |
| 10/25/2000 | CN2402802Y Feeding device for deep-sea mining and ore-lifting system |
| 08/17/2000 | WO2000047832A1 Method for extracting methane hydrate on the ocean floor |
| 08/17/2000 | DE19906147A1 Verfahren zur Gewinnung von gefrorenem Gas auf dem Meeresgrund A process for obtaining a frozen gas on the seabed |
| 08/17/2000 | CA2328859A1 Method for extracting methane hydrate on the ocean floor |
| 07/27/2000 | DE19902133A1 Subsea exploitation of raw materials employs ship, suspended pumping system and central unit on sea bed with satellite recovery equipment, bringing sea bed or subsea resources to surface |
| 06/14/2000 | CN1053481C Oceanic multi-metal nodule hydraulic collecting mechanism |
| 01/27/2000 | DE19833192A1 Process for burying highly viscous hydrocarbon products involves heating carrier in heat exchanger, via pump and reactor, with regulator, pipe and nozzles |
| 01/19/2000 | CN2359466Y Deep sea electromagnetic propulsion mineral collecting machine |
| 12/21/1999 | US6003952 Underwater mining machine |
| 12/08/1999 | CN1237677A Mine-taking method by using sea water of deep sea |
| 11/24/1999 | EP0958446A2 Method and device for driving bore-holes, specially for prospection and extraction drillings |
| 09/14/1999 | US5950732 Useful for recovering liquid hydrocarbons from gas from hydrates of hydrate formation on an ocean floor |
| 08/09/1999 | CA2272858A1 Subaerial dredge |
| 06/09/1999 | EP0921237A2 Exploitation device |
| 04/14/1999 | CN2314095Y Sand sucking boat |
| 10/22/1998 | DE19715284A1 Underwater mineral recovery unit operated in conjunction with ship |
| 10/08/1998 | WO1998044078A1 System and method for hydrate recovery |
| 10/08/1998 | CA2285196A1 System and method for hydrate recovery |
| 10/01/1998 | WO1998042922A1 Underwater mining machine |
| 10/01/1998 | WO1998032951A3 Method and device for driving bore-holes, especially in the sea bed, using a guide tip |
| 10/01/1998 | CA2285630A1 Underwater mining machine |
| 07/30/1998 | WO1998032951A2 Method and device for driving bore-holes, especially in the sea bed, using a guide tip |
| 07/15/1998 | CN1187574A Method for extracting ore from deep seawater |
| 06/04/1998 | DE19702983C1 Drilling head adapting efficiently to both soft and hard going |
| 12/17/1997 | CN1167872A Oceanic multi-metal nodule hydraulic collecting mechanism |
| 03/06/1997 | DE19531581A1 Device for extraction of sand and gravel from underwater deposits |
| 02/27/1997 | DE19531474A1 Cutting and extraction equipment, for mining rock submerged in liquid |
| 02/20/1997 | DE19531828A1 Recovering highly viscous prods., e.g. oils, from storage areas |
| 09/10/1996 | US5553976 Fluid riser between seabed and floating vessel |
| 07/31/1996 | CN2232077Y Multifunctional sand pump |
| 06/19/1996 | CN2229514Y Crawler self-propelled collecting apparatus for deep sea mining |
| 05/02/1996 | DE4438269A1 Salvaging viscous materials from disposal sites |
| 11/28/1995 | CA2043410C Seafloor drilling apparatus |
| 08/24/1995 | WO1995022678A1 Fluid riser between seabed and floating vessel |
| 08/24/1995 | CA2182891A1 Fluid riser between seabed and floating vessel |
| 10/27/1994 | DE4313293A1 Method of working semicircular to circular panels in wet extraction |
| 07/12/1994 | US5328250 Self-propelled undersea nodule mining system |
| 11/09/1993 | US5259130 Floating grab installation for the recovery of sand and gravel |
| 04/06/1993 | US5199767 Method of lifting deepsea mineral resources with heavy media |
| 01/27/1993 | EP0524446A1 Grab unit mounted on floats for the production of sand and gravel |
| 01/05/1993 | CA1312350C Undersea operation system |
| 12/09/1992 | EP0382726B1 Process and device for dredging silt in ports, waterways and the like |
| 06/25/1992 | WO1992010618A1 Device for conveying objects of any kind from water |
| 06/17/1992 | DE4039473A1 Verfahren zum foerdern von gegenstaenden jeglicher art aus gewaessern A method for conveying objects of any kind from waters |
| 08/27/1991 | US5042959 Vehicle |
| 07/30/1991 | US5035291 Seafloor drilling apparatus |
| 07/25/1991 | WO1991010808A1 Pumping method for ores of deep sea mineral resources using heavy liquid |
| 06/20/1991 | DE3941123A1 Schleppzahn fuer schneidraeder Trailing tooth for cutting raeder |
| 06/14/1991 | WO1991009181A1 Traction tooth for cutting wheels |