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| Number | Title | Issue Date |
| 8186907 | Slab leveling system and method A system for leveling a slab by raising and filling in voids under the slab. A mixture of compressed air and well dried sand is pumped through hose to a gun nozzle. The slab to be leveled is supplied with at least one hole for receiving the gun nozzle in a fluid tig... | 05/29/2012 |
| 8092116 | Slab raising method A method of raising a slab is described here that uses inflatable hoses to raise slabs needing to be raised, for example, to raise sunken slabs of a roadway to align to their adjacent slabs without closing the roadway and breaking ongoing traffic. The described meth... | 01/10/2012 |
| 7461997 | Sidewalk and slab lifting system A tube body having open upper and lower ends and a cylindrical bore there between has an opening along the length thereof. A driver is secured to the tube body adjacent to the upper end. A push rod has a free end. The free end is adapted to move downwardly to an adv... | 12/09/2008 |
| 7226274 | Cement slab leveling apparatus A concrete slab leveling apparatus is provided that is built upon a vehicle such as a flatbed truck or trailer which makes it highly transportable enabling the invention to move from site to site quickly and easily. The flatbed platform of the vehicle is equipped wi... | 06/05/2007 |
| 6976804 | Method of repairing damaged concrete slabs A method of repairing concrete slabs that have become uneven and dangerous is provided that employs lime sludge that is injected under pressure into the space between the lower surface of the damaged concrete slab and the underlying ground to raise that slab back in... | 12/20/2005 |
| 6808335 | Method of reconstructing existing bridges and highways with minimal disruption of traffic A method of reconstructing existing roadway (21) on order to restore structural integrity of bridge roadway (23) with minimal disruption of traffic. First elevated roadway (41), which comprises a plurality of interconnected ramp units and bridgi... | 10/26/2004 |
| 6558071 | Pavement system A pavement system utilizing a plurality of individual pavement segments. The elevation of the individual pavement segments can be adjusted by pumping a flowable material below the pavement segments through pre-formed ports in the pavement segments.... | 05/06/2003 |
| 6521673 | Composition and method for preparing polyurethanes and polyurethane foams Polyurethane forming compositions having a water insoluble, non-hydrocarbon diluent provide polyurethanes with improved properties. Polyurethane forming reaction mixtures having a water insoluble diluent provide compositions that permit the formation of p... | 02/18/2003 |
| 6454632 | Method of hardening and polishing concrete floors, walls, and the like A method of both hardening/densifying and polishing a concrete surface includes the steps of first applying to the concrete surface a silicate, siliconate, fluorosilicate, siloxane, silazane, silicon ester, and/or silane hardening/densifying compound, all... | 09/24/2002 |
| 6419127 | Apparatus for raising concrete members An apparatus for raising concrete members and maintaining the members in a raised position. The apparatus may be utilized for raising or leveling flat slabs such as sidewalk sections, driveways and patios or for raising sunken sections of curbs and gutter... | 07/16/2002 |
| 6155907 | Method for hardening and polishing concrete floors, walls, and the like A method of both hardening and polishing a concrete surface includes the steps of first applying to the concrete surface a hardening/densifying silicate compound, allowing the compound to remain in contact with the surface for a period of time sufficient ... | 12/05/2000 |
| 6068425 | Method and apparatus for raising concrete members A method and apparatus for raising concrete members and maintaining the members in a raised position. The method and apparatus may be utilized for raising or leveling flat slabs such as sidewalk sections, driveways and patios or for raising sunken section... | 05/30/2000 |
| 5860763 | Sidewalk leveling method and device The present application discloses a sidewalk lifting device made of steel framed tower that has a flat plate extending inward from the lowest end of the tower. This plate holds the lower surface of a sidewalk slab and also provides the lifting surface to ... | 01/19/1999 |
| 5441360 | Asphaltic compositions and uses therefor Asphaltic concrete compounds comprised of asphalt cement and aggregate have, as a substantial portion of their respective aggregates, anthracite coal particles and fines, which are added specially as a lossy microwave material. These asphaltic concrete co... | 08/15/1995 |
| 4659748 | Method and composition for repairing cementitious surfaces An improved method and composition for repairing cementitious surfaces is provided. A polymerizable urethane composition having an excess of isocyanate groups to account for water present in the reaction environment is utilized. The method utilizes water,... | 04/21/1987 |
| 4567708 | Method for levelling sunken or broken portions of earth-supported floors and slabs The method relates to levelling sunken or broken portions of earth-supported floors or slabs (2, 2A). At least one hole (1) is made in the floor, and polyurethane foam is sprayed between the floor and the underlying earth through this hole. The foam creat... | 02/04/1986 |
| 4470719 | Method for repairing or preventing faulting on concrete highways A method is provided for repairing or preventing the faulting phenomenon in unreinforced concrete highways. Flowable, foamable, curable compositions are injected into the transverse joint between concrete slabs to fill any voids that exist between or unde... | 09/11/1984 |
| 4092832 | Method of correcting the height level of a foundation Disclosed is a method of correcting the height level of a concrete foundation or the like which is supported on a loose soil material. The bearing capacity of the soil material has been locally increased under the foundation by means of an oblong casing w... | 06/06/1978 |
