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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7568860 | System for articulably bearing a prefabricated structural member on a foundation A system for articulably bearing a prefabricated structural member on a foundation includes a first static hinge interposed between the base of the upright of the structural prefabricated member and the foundation, and an additional static hinge which is also arrang... | 08/04/2009 |
| 7441990 | Process for the construction of a segment of an open-air work by prefabricated structural members, and prefabricated structural member related thereto A process for the construction of a segment of an open-air work by prefabricated structural members of reinforcing concrete, includes the steps of arranging first and second prefabricated structural members (18, 19) including an upright portion (22) an... | 10/28/2008 |
| 7025537 | Subterranean structures and methods for constructing subterranean structures One embodiment of the present invention provides for a subterranean structure, having a continuous ribbon slab having a plurality of flights fabricated from concrete. The ribbon slab defines periodic openings therein which generally align between adjacent flights. A... | 04/11/2006 |
| 6988337 | Means and method for constructing a fully precast top arch overfilled system The top arch overfilled system defined in application Ser. No. 10/102,921 is formed of precast arch elements which are formed and shipped in a use orientation. The precast arch elements can include arch footings and the system can include a plurality of precast arch... | 01/24/2006 |
| 6948885 | Method for constructing foundation A method of construction includes positioning at least one support member (2) in the ground, forming a foundation (4) substantially adjacent the at least one support member, excavating ground beneath the foundation to a prescribed depth below the surfa... | 09/27/2005 |
| 6719492 | Top arch overfilled system An earth overfilled arched structure includes a shallow arch spanning a clear space. The sides of the clear space are formed by curved or straight walls. Solidified zones of earth material (backfill or in situ) against the springs of the arch and/or behind the walls... | 04/13/2004 |
| 6554536 | Linings for sewers During manufacture of a sewer or tunnel lining section, sand-resin material is deposited over a mould, to define a central part of the section. Sand-resin material is removed using a wire arranged to lie a predetermined radial distance from the surface of... | 04/29/2003 |
| 6450734 | Transportation underwater tunnel system An underwater tunnel system for vehicular traffic flow, including rail, automobile and truck traffic connecting the shores of opposed land masses separated by a body of water draws heavily from submarine manufacturing and modular construction technology. ... | 09/17/2002 |
| 6406220 | Arched support structure A support structure and method for forming same for use in excavations such as underpasses, tunnels and the like for roads, rail or rivers. The support structure allows the utilization of the strength provided by using arch shaped sections and also minimi... | 06/18/2002 |
| 6375390 | Method for widening road, superhighway or railway tunnels, without interrupting the traffic A construction method for widening road, superhighway or railway tunnels, without interrupting the traffic flow includes a first stage of excavation; in steps, of the ground between the theoretical profile of the future widened tunnel and that of the orig... | 04/23/2002 |
| 6328501 | Method of manufacturing a tunnel or shaft lining or pipeline A method of manufacturing a tunnel (10) or shaft lining or pipeline of segments (12), wherein each segment (12) comprises a concrete body (11) having an extrados (13) surface, an intrados (14) surface and first and second ends (15, 16) and first and secon... | 12/11/2001 |
| 6129484 | Prefabricated structure for the construction of overhead or underground works A prefabricated structure for the construction of open air structures, particularly motorway flyovers, underpasses, bridges, tunnels, underground carparks and the like, includes a plurality of prefabricated elements of reinforced concrete. These elements ... | 10/10/2000 |
| 5899635 | Transportation underwater tunnel system An underwater tunnel system for vehicular traffic flow, including rail, automobile and truck traffic connecting the shores of opposed land masses separated by a body of water draws heavily from submarine, manufacturing and modular construction technology.... | 05/04/1999 |
| 5749399 | End sections of connections for mineral wool conduits of the "Climaver Plus" type A shaping member for the finishing of junctions for "Climaver Plus" type glass wool piping comprising a unitary flat plate of bendable material which can be folded into sections to form a shape such that the shaping member can be placed at the junction of... | 05/12/1998 |
| 5551798 | Culvert end wall retainer system Pre-fabricated end wall for culvert includes a novel pre-cast concrete slab shaped with an upper margin longer than the lower margin and with inclined side or end margins which are proximate the angle of repose of the culvert or ditch in which the culvert... | 09/03/1996 |
| 5522676 | Undercut excavation method An excavation method is provided, which is particularly suitable as an undercut-and-fill mining method, wherein posts are inserted into the ground and are used to support a concrete floor of the upper level which serves as a roof for the lower excavation ... | 06/04/1996 |
| 5322390 | Underwater tunnel and an underwater mooring apparatus to moor the underwater tunnel An underwater tunnel consisting of: a foundation body moored to the bottom of the water; a support frame erected on the foundation body; and a tunnel body formed integral with the support frame; wherein the tunnel body is formed in a two-layer constructio... | 06/21/1994 |
| 5281053 | Underground tubular structural system and process for producing it An underground tubular structural system capable of having a very large cross section, for the construction of urban or rural conduits, underground passages and other civil engineering installations. At least two conduits (S1) (S2), namely, a high conduit... | 01/25/1994 |
| 5129761 | Pipe placement method and apparatus A method and associated apparatus are shown for highly efficient manipulation of multiple pipe sections within the close confines of a tunnel formation to construct an underground conduit. Overall production is improved by adapting pipe section transport ... | 07/14/1992 |
| 4854775 | Precast concrete culvert system A precast concrete culvert system includes a series of open bottom culvert sections each having parallel spaced vertical side walls integrally connected to an arcuate top wall having a curved inner surface with a radius of curvature at least twice the ris... | 08/08/1989 |
| 4836714 | Enclosed structures of very large cross-section, such as conduits, silos or shelters Enclosing structures having tubular sections which are elliptical in cross-section, each section being an assembly of prefabricated components corresponding to a portion of the cross-section of the tubular section and including side components and a vault... | 06/06/1989 |
| 4815895 | Construction of tunnels or pipes for use in civil engineering works A tunnel or pipe section which includes a plurality of panels which are connected together to form a closed tunnel or pipe section. Each panel includes a plurality of tubular connectors which are anchored within the panel, preferably to the reinforcing me... | 03/28/1989 |
| 4673312 | Method and apparatus for the underground installation of pipelines A method and apparatus for the underground installation of pipelines. The underground installation of pipelines is carried out by driving pipe sections into the ground. The earth is loosened at the driving face via a liquid jet, and the excess earth is tr... | 06/16/1987 |
| 4147449 | Protection conduit line for laying underground cables An underground conduit-forming structure made of concrete for easily forming a protection conduit line for laying underground cables, e.g., power cables, communication cables, etc. For snug coupling between the leading and trailing structures, each struct... | 04/03/1979 |
| 4147452 | Method for constructing a rectangularly shaped tunnel A rectangularly shaped tunnel is constructed to include an artificial roof, side wall pillars, a center wall pillar and floor portions all extending along the length of tunnel. The artificial roof is formed by sequentially excavating cross cut shafts and ... | 04/03/1979 |
| 4116011 | Method of excavating tunnels A method of excavating tunnels comprises digging an excavation to form a tunnel, gradually pushing a casing inwardly of the excavation as the excavation proceeds, the cross-sectional area of the excavation being larger than the outer cross-sectional area ... | 09/26/1978 |
| 4106297 | Method of and an arrangement for establishing an underground passage An arrangement for establishing an underground passage includes a first line of consecutive pipe sections which are pressed through the ground in a path which deviates from the desired course of the passage whenever the first line of pipe sections encount... | 08/15/1978 |
