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 |
| 4263759 | Swimming pool construction and method of making the same An in-ground swimming pool which utilizes a relatively flexible, continuous sheet-like wall member in combination with a bottom construction which is formed from polyurethane foam. The polyurethane foam bottom is reinforced at the surfaces of concave curv... | 04/28/1981 |
| 4259817 | Insulative roof apparatus Insulative roof apparatus includes flexible layers of different materials, including insulation and sealing materials, all of which are flexible, to withstand movement of the roof of mobile homes and similar buildings.... | 04/07/1981 |
| 4245931 | Post assembly and method A post assembly and method of capping a post, especially useful for pilings, e.g., as used for docks and the like. A covering over a post end is comprised of an outer cover and a semi-rigid, energy-absorptive, predominantly closed-cell body of foamed synt... | 01/20/1981 |
| 4224773 | Large area wall element of lightweight sandwich design for prefabricated buildings A large area wall element of lightweight sandwich design for prefabricated buildings has a weatherproof outer layer which is formed by facing panels which are fixed to a foamed plastic layer by means of an adhesive layer in which fiberglass matting is emb... | 09/30/1980 |
| 4223487 | Roof construction and method of making the same A roof construction utilizing thermoplastic panels and a method of making the same. The thermoplastic panels are arranged in edge contacting relation to span a roof underpanel supported by a roof frame. The thermoplastic panels carry anchor members projec... | 09/23/1980 |
| 4216634 | Composite building column A foam filled metal shell building column for dwellings and the like comprises one or more thin metal sheets formed as a hollow shell having a longitudinal load-bearing axis. The thin-walled hollow shell is filled with a core of a plastic foaming material... | 08/12/1980 |
| 4206267 | Composite structural material A composite structural material is disclosed which comprises a profiled steel sheet and an insulating layer bonded to the profiled steel sheet on at least one side thereof, said insulating layer comprising an expanded mineral core layer bonded with an ino... | 06/03/1980 |
| 4189457 | Method of sealing coke ovens A method for sealing a by-product coke oven in which a silicone material is caused to foam to form a foaming silicone composition preferably by mixing a first mixture of organohydrogensiloxane and hydroxylated organosiloxane with a second mixture of organ... | 02/19/1980 |
| 4161090 | Post assembly and method A post assembly and method of capping a post, especially useful for pilings, e.g., as used for docks and the like. A covering over a post end is comprised of a semi-rigid, energy-absorptive, predominantly closed-cell body of foamed synthetic resin with a ... | 07/17/1979 |
| 4160346 | Roof coating composition and construction A roof having an insulating blanket of plastic foam covered by a protective sheath made up of a shell of reinforced concrete covered by a weather-impervious rubbery textured membrane. The membrane and the shell are married together in the sheath, the shel... | 07/10/1979 |
| 4151692 | T-Shaped insulation with vapor barrier A T-shaped batt of insulation with a U-shaped vapor barrier covering the lower surface of the batt. The vapor barrier, which extends beyond the ends of the batt is used to connect consecutive batts. The T-shaped batts are installed by rolling them between... | 05/01/1979 |
| 4147003 | Insulated roof A reel of flexible sheet material of a width wider than the space between adjacent ones of the purlins in a roof structure is mounted on a support framework over a space between adjacent ones of the purlins. The framework is moved along the purlins and th... | 04/03/1979 |
| 4128934 | Method of making a thermally insulated window frame To provide a frame with members having two outer elements which are interconnected by an insulator, each member is formed from a hollow bar in which the insulator is molded and then two longitudinal strips are removed from the bar, the two remaining parts... | 12/12/1978 |
| 4109436 | Reinforced foam building panel element A building panel element comprising a rectangular frame provided on one of its outer surfaces with a wooden plate and on its other outer surface with a plurality of regularly spaced wooden strips, and an insulating rigid foam which completely fills the in... | 08/29/1978 |
| 4065893 | Composite foundation framing assembly Composite members for foundation, floor and roof systems in structures, including multistory structures, the roof assembly of which includes a ceiling and roof member, between which members is sandwiched an expanded foam material; the floor and alternativ... | 01/03/1978 |
| 4065899 | Interlocking combination shingle and sheeting arrangement An integrated shingle construction in which shingles are constructed perferably of foamed plastic primarily, the construction being in the form of panels in which the foamed plastic shingle is integrated with a board or wooden roofing member such as a sta... | 01/03/1978 |
| 4063395 | Twin membrane, self sealing, mechanically fastened insulated roof deck system A roofing system comprising a fire resistant rigid class A fire rated board as a substrate having bonded thereto a sheet of foamed, insulating resin and having a tough weather resistant membrane bonded to the upper surface. A ledge of substrate about 1/2 ... | 12/20/1977 |
| 4052831 | Panel building construction and method, and clip Composite panels, each having a rigid board facing, made from gypsum, concrete, wood, or fibrous material, backed by a layer of foamed plastic insulating material whose reverse face is protected by a highly reflective, flame-retardant, moisture-vapor-proo... | 10/11/1977 |
| 4044449 | Method of making refrigerating units and the like and product thereof A method of manufacturing refrigerating units (equipment), such as refrigerating and refrigerated showcases, store fixtures and the like, including forming walls, partitions and/or panels having a layer of plastic foam formed in situ. Standard modular ele... | 08/30/1977 |
| 4032689 | Construction laminate of plastic foam between paper sheets A construction element having a high strength to weight ratio, particularly useful in the fabrication of a boat hull, the construction element comprising: A first face layer of resin impregnated glass fiber cloth or glass fiber matting; An intermediate st... | 06/28/1977 |
| 4006731 | Building deck construction A building deck structure having sheet metal structural shapes of a box section as sub-purlins, the upper face of the box section having open slots for engaging sheet metal clips which are secured in the box section when the axis of the clip and the box s... | 02/08/1977 |
| 3992842 | Roof construction of a plurality of thermoplastic composite sheets with inorganic flameproofing layer A synthetic resin composite sheet is made of a synthetic resin such as soft PVC, for sealing non-graveled, single-shell roofs or the like, and is provided with a flameproofing layer. The flameproofing layer is embedded within the synthetic resin.... | 11/23/1976 |
| 3965633 | Insulated roofing structure and method A fireproof insulated roofing sandwich type assembly having incombustible rigid gypsum formboard beneath and toward the interior of a building from a layer of synthetic polymer foam placed above to the exterior of the building from the rigid formboard and... | 06/29/1976 |
| 3938288 | Reinforcing device for automobile body This device for improving the safety of automotive vehicles comprises a structure adapted to be fitted in the lateral doors of the vehicle between the main panels thereof, said structure consisting of a sleeve member secured parallel to said panels in the... | 02/17/1976 |
