Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8142104 | Dowel sleeves A support leg for a dowel sleeve, the dowel sleeve having a hollow open body at a second end spaced from one end of the body connectable to a construction plate. The support leg has a spigot engagable in the body, the exterior of which is engaged by an abutment face... | 03/27/2012 |
| 7404691 | Dowel bar assembly with snap fit side frames An apparatus for combining adjacent concrete slabs including a dowel, an end cap, and a side frame. The end cap has a hood defining a curved channel extending at least partially around a dowel receiving end. The side frame has at least one wire received in the curve... | 07/29/2008 |
| 7373764 | Extruded upper beam slab bolster for use in construction A bolster for use in construction has a beam, a first plurality of leg members on one side of the beam, a second plurality of leg members on an opposite side of the beam, and a plate having a first receptacle on one side and a second receptacle on the opposite side.... | 05/20/2008 |
| 7328538 | Rebar spacer A rebar spacer having a clip for securely holding a rebar centered in the clip such that the rebar cannot be dislodged from the clip once the clip engages the rebar. The clip is held at a desired height by a base, which will not easily tip over do to a wide stance o... | 02/12/2008 |
| 7322158 | Intersectional reinforcing bar support with C-shaped clamps A concrete reinforcing bar support has a base, a support structure extending upwardly from the base with a channel formed at an upper surface thereof, a first clamping structure affixed to the support structure on one side of the channel, and a second clamping struc... | 01/29/2008 |
| 7284354 | Upper beam slab bolster with extruded plates A bolster for use in construction has a beam, a first plurality of leg members on one side of the beam, a second plurality of leg members on an opposite side of the beam, a first plate having a receptacle on one side thereof and a second plate having a receptacle on... | 10/23/2007 |
| 7237367 | Construction chair for use with tilt wall construction A chair has a receiving area and a plurality of separate legs extending downwardly from the receiving area. Each of the separate legs has a first portion extending in an angle outwardly from the receiving area and a second portion extending from an end of the first ... | 07/03/2007 |
| 7143563 | Tie and tie method for binding together adjacent support elements A tie and a tie method for binding together adjacent support elements such as concrete reinforcing bars by employing a tie having a frame which can be disposed about the bars, and a wedge adapted to be forcibly driven between resilient portions of the frame and the ... | 12/05/2006 |
| 7134248 | Pre-cast panel form insert The present invention is directed to a pre-cast panel form insert used in precast construction. The insert comprises a substantially planar portion defining dimensions suitable to complement dimensions of a pre-cast panel form and a fluid diverting portion. The flui... | 11/14/2006 |
| 7108453 | Support for concrete reinforcing members A structure is described for supporting concrete reinforcement bars in a concrete structure, such as a footer or foundation. The structure includes a base member having a lower surface and an opposing upper surface. A plurality of pairs of opposing first leg members... | 09/19/2006 |
| 7086203 | Support A support apparatus (10) for providing a robust load bearing support for screed rails (12) during the laying of concrete in which the height of the screed rails can be accurately adjusted and supported so as to allow the screed rails to be used for car... | 08/08/2006 |
| 7028443 | Wire mesh chair A chair for supporting wire mesh while pouring concrete slabs. The chair has a generally tapered, hollow body with a receiving area for fixedly retaining the wire mesh. The receiving area includes walls extending upwardly between notches, with the walls defining pas... | 04/18/2006 |
| 6962029 | Chair for supporting wire mesh An improved chair for supporting intersecting wires forming a wire mesh at a pre-selected elevated position above a bearing surface during formation of a concrete slab is constructed having a base member shaped to rest on the bearing surface, a compressible support ... | 11/08/2005 |
| 6837017 | Apparatus for placing rebar in continuously reinforced concrete paving A transverse bar assembly for use in constructing rebar mats for reinforcement of concrete paving includes a plurality of chairs and clips each having a lower portion that fixes to a transverse bar in the direction of its length and an upper portion for orthogonally... | 01/04/2005 |
| 6663316 | Support for concrete reinforcing members A structure is described for supporting concrete reinforcement bars in a substantially orthogonal relationship above a surface. The structure includes a base member having a central opening. At least a pair of long leg members extend upward from the base ... | 12/16/2003 |
| 6447203 | Load transfer dowel support The invention relates to supports for apparatus for transferring weight loads from one concrete structure to another. The devices are particularly suited for concrete highway construction. The support apparatus is used to position joint dowels that extend... | 09/10/2002 |
| 6212848 | Construction chair with plastic base A support device for use in tilt-wall construction including a support body having at least two support legs and a bottom extending between the support legs, and a base formed of a polymeric material. The base is affixed to the bottom of the support body.... | 04/10/2001 |
| 6178716 | Reinforced-concrete floor slab thickness indicator/reinforcement rod spacer combination A reinforced-concrete floor slab thickness indicator/reinforcement rod spacer combination consists of a base, a spacer and an indicator erected from the base, and a bracket integrally and laterally extended from the spacer. The indicator is releasably att... | 01/30/2001 |
| 6089522 | Method and apparatus for supporting reinforcement members The present invention is an improved high chair which positions and supports reinforcement members at a desired distance from a surface. The high chair has a body with a lower base portion, an upper connecting portion and an upper support surface. One or ... | 07/18/2000 |
| 6019546 | Support for load transfer device for concrete constructions The invention relates to supports for a device for transferring weight loads from one concrete structure to another. The device is particularly suited for concrete highway construction. The supports are used to position joint dowels that extend across pav... | 02/01/2000 |
| 5819493 | Height adjustable rebar support system A new Height Adjustable Rebar Support System for supporting rebar at various elevations during pouring and curing of concrete with a single adjustable support member. The inventive device includes a first panel having a first lower slot, a second panel pi... | 10/13/1998 |
| 5791816 | Concrete joint restraint system A dowel support for use in concrete joint restraint system as is typically used for slabs in highway construction is provided, as is a concrete reinforcing system employing the dowel supports. The dowel support is used to support dowels of different diame... | 08/11/1998 |
| 5700385 | Apparatus for supporting and locating buried cable and similar devices An apparatus or clip is disclosed, which can be used both to securely hold and support a heating cable or mat at a desired depth within a slab form, and to easily locate the cable or mats once embedded using a simple magnetic field. The clips of this inve... | 12/23/1997 |
| 5678952 | Concrete dowel placement apparatus A concrete dowel placement apparatus comprising a base member and an elongate, tubular dowel receiving sheath which is connectible to the base member. The base member comprises an outer sleeve having first and second ends, and an inner sleeve which is dis... | 10/21/1997 |
| 4953340 | Bar support for concrete The rod-support chair of the present invention comprises a plastic channel made of a thermoplastic resin preferably selected from the group consisting of polycarbonate, aromatic polyester carbonate and aromatic polyesters. The channel is further character... | 09/04/1990 |
| 4913582 | Adjustable pipe screed support A screed chair having a base member and at least one threaded vertical member mounted therein supports a screed pipe on a yoke offset from the vertical member such that the yoke and pipe are isolated from rotation during rotation of the vertical member to... | 04/03/1990 |
| 4756641 | Sand plate and concrete reinforcement support An improved system is provided for elevating and supporting reinforcement rods above an earthen bed upon which concrete is poured. A flat, disk-shaped sand plate is disposed in contact with the earthen bed and has a plurality of channels adapted to receiv... | 07/12/1988 |
