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 |
| 4219051 | Heat recoverable article A heat recoverable warp-around closure member comprises a sheet having a pair of elongate parallel spaced-apart profiles that may be interlocked, optionally with internal or external support or fastening means associated with the profiles, when the sheet ... | 08/26/1980 |
| 4211260 | Multilayer vessel or tube construction A multilayer vessel or tube comprises an inner core tube and a plurality of supporting layer tubes around said inner core tube which have degassing bores. A blind layer is provided between the core tube and the innermost supporting layer tube and a plural... | 07/08/1980 |
| 4207918 | Insulation jacket An insulation jacket for use as a valve cover. The jacket comprises a body portion comprising a central section and two lateral sections. Each of the lateral sections comprises an inboard and outboard belt and each of the belts extends along each of the l... | 06/17/1980 |
| 4207364 | Heat-shrinkable laminate An article such as a tube formed of heat-shrinkable material is bonded exteriorly or interiorly to an elastomeric member to form a laminated article. The bonding preferably takes place before heating and expanding of the heat-shrinkable tube. After expans... | 06/10/1980 |
| 4206786 | Heat recoverable article with fusible member Described herein are heat recoverable articles comprising a recoverable member held in a deformed condition by a fusible member. When the fusion temperature of the fusible material is exceeded, the recoverable member is able to move in a direction toward ... | 06/10/1980 |
| 4205105 | Pipe insulation Pipe insulation is disclosed made up of right cylindrical elements, or washers, held together by a flexible coating and in which the fibres are aligned in planes perpendicular to the cylindrical axis. The elements have central bores to receive pipes to be... | 05/27/1980 |
| 4200999 | Pivotable means for decreasing drag effects on a generally cylindrical dredge pipe This invention provides a substantially flat plate hingedly connected to a substantially cylindrical pipe intended to be moved through the water in a generally longitudinal alignment, the plate extending behind the pipe during movement through the water. ... | 05/06/1980 |
| 4197880 | Sealing and insulating article and method A heat-recoverable article for sealing or insulating the surface of a substrate comprises a dimensionally heat-recoverable member and heat expansible material positioned in the direction of recovery thereof so that when heat is applied the material expand... | 04/15/1980 |
| 4195669 | Method of arresting crack propagation in line pipe characterized by ductile fracture A method for arresting a propagating crack in a steel line pipe characterized by ductile or mixed mode fracture which involves providing a mass of material on or around the pipe which is sufficient to constrain or reduce the outward acceleration of the pi... | 04/01/1980 |
| 4193899 | Elastomeric systems having unusual memory characteristics This invention involves a process for the utilization of an unusual memory characteristic which is present in neutralized sulfonated elastomeric materials, wherein the process includes the steps of distorting or compressing the neutralized sulfonated elas... | 03/18/1980 |
| 4190088 | Chafe or fire sleeve for hose A chafe or fire sleeve for a hose is an integral coaxial structure having an inner layer of silicone and an outer layer of urethane in the range of 80%-20% urethane and 20%-80% silicone, respectively. The inner hose structure preferably comprises an elast... | 02/26/1980 |
| 4190086 | Connector device for the quick coupling of floating hoses A quick coupling connector device, which is intended for use as a terminal connecting member for a floating hose piping. The connector device is composed of two floating parts, which define, when assembled, one single floating body with hydraulic seal pro... | 02/26/1980 |
| 4186778 | Hose construction having integral fire extinguishant and method of making same A hose construction and method of making same are provided wherein such hose construction is made primarily of combustible polymeric material and has a tubular inside surface defining a longitudinally extending passage for conveying a fluid therethrough a... | 02/05/1980 |
| 4184489 | Infusion tube access site An extra corporeal blood tube injection site comprising a smooth blood conduit or tube, an elongated elastomeric sleeve surrounding a section of the tube, and a C-shaped needle-impenetrable member extending along and partially surrounding the sleeve which... | 01/22/1980 |
| 4181157 | Fire sleeving An article of protecting high pressure hydraulic lines, fuel lines and the like is disclosed. The article includes a silicone polymer coated and impregnated glass fiber woven sheet. The sheet is self-coiling and normally assumes the configuration of a coi... | 01/01/1980 |
| 4179320 | Recoverable articles Flexible hollow articles comprise an expanded elastomeric inner member and an outer restraining means. The restraining means has score lines thereon, and is made of a notch-sensitive material so that the score lines can be propagated through the material ... | 12/18/1979 |
| 4176691 | Apparatus for arresting propagating fractures in pipelines A device for arresting the propagation of a crack, split or fracture in a pipeline comprises a cylindrical sleeve of greater diameter than the pipeline and having an annular and end plate fixed at each end thereof, the assembly thus formed being arranged ... | 12/04/1979 |
| 4170044 | Hydrotherapy apparatus and ducting therefor Hydrotherapy apparatus including continuous extruded plastic ducting of keyhole shape in cross-section adapted to be installed in the wall of a water pool and having a multiplicity of air dispensing perforations substantially flush with the interior wall ... | 10/09/1979 |
| 4168726 | Thermal boot apparatus A thermal boot apparatus for enclosing a test port and cap for a power house precipitator comprising an inner and an outer stainless steel mesh sleeve each having one end enclosed, a layer of insulating material sandwiched between the inner and outer slee... | 09/25/1979 |
| 4162546 | Branch tail piece A branch tail piece for connecting the waste water outlet of an automatic dishwasher or the like to a sink drain system. The tail piece includes an inclined branch member and a curved baffle positioned within the tail piece for preventing waste water from... | 07/31/1979 |
| 4161193 | Open ducts designed for ready disassembly and re-use Open ducts for ground heating of hothouses consist of flattened tubes of flexible material such as plastic. The tubes are slit open lengthwise, folded back over tensioned cords and secured by fasteners so as to form the edges of the ducts, the two ends of... | 07/17/1979 |
| 4161182 | Sanitary hose holder An extensible sanitary hose used for the transfer of sewage from a holding tank to a sanitary facility may be cleaned and stored by the use of a combination holding and cleaning device which is fabricated from an elongated hollow cylinder having a number ... | 07/17/1979 |
| 4160466 | Flexible multi-conduit tube and its manufacture An improved assembly of flexible multi-conduit tubing, and a method for the manufacture thereof are disclosed. The assembly provides a multiple conduit tube which is preformed in a specific helical shape to reduce bulk and to automatically return to shape... | 07/10/1979 |
| 4157101 | Hose structure A hose that will withstand pressure and vacuum as well as resist kinking or collapsing in which the wall structure includes at least two radially spaced layers of monofilaments of textile material with a layer of elastomeric material separating the layers... | 06/05/1979 |
| 4155372 | Portable siphon apparatus for removing concentrations of liquid from a gas pipeline An apparatus for removing concentrations of liquid from a natural gas pipeline comprising a tap valve mounted on the pipeline at the upper portion thereof so as to be in communication with the interior of the pipeline. A siphon apparatus is removably moun... | 05/22/1979 |
| 4153079 | Flexible hose lines A flexible hose line which may be used for loading and unloading oil tankers having a secondary fluid retaining reinforcement carcass to retain leakage and to indicate by radial expansion failure of the main carcass. The secondary carcass may be of high e... | 05/08/1979 |
| 4148343 | Blow plate and blow tube assembly A blow plate and blow tube assembly. The blow tube conveys core-making sand from the blow plate to a cavity in a core box for forming a sand core utilized in metal casting. The blow plate has a discharge passage with female threads. The blow tube has a bo... | 04/10/1979 |
| 4148341 | Long-distance heating conduit A long-distance heating conduit comprising one or more tubes which carry the heating medium, are laid in the conduit and are surrounded individually or jointly by at least one layer of heat-insulating material and are covered by at least one cover foil wh... | 04/10/1979 |
| 4139026 | Pipe elbow fitting cover A pipe elbow fitting cover is described which can be manually folded from a first open trough-like shape to a second shape generally corresponding to the shape of the elbow to be covered and which incorporates means to maintain that second shape without t... | 02/13/1979 |
| 4135553 | Recoverable sleeve A recoverable tubular article comprising an elastomeric sleeve held in a radially expanded or extended condition and capable of recovering to its pre-expanded condition of smaller diameter upon the removal of an outer restraint, an outer restraint, essent... | 01/23/1979 |
| 4134430 | High pressure fuel injection pipe A high pressure fuel injection pipe is produced by squeezing an end portion of a small-diametered steel pipe member having a flow path extending through the center thereof to form a flow path of reduced diameter in the end portion communicating with the c... | 01/16/1979 |
| 4130303 | Reinforced pipe cross fitting A pipe cross fitting for interconnecting tubular structural members of an offshore platform of the type used by the oil industry. The cross fitting is reinforced by the addition of an internal structural element that extends across the central open portio... | 12/19/1978 |
| 4130140 | Heat insulated conduit especially suitable for carrying high temperature fluids A conduit especially suitable for carrying high temperature fluids is disclosed herein and includes an outer casing, a concentric inner core and an intermediate concentric layer of insulation material. The conduit also includes what may be referred to as ... | 12/19/1978 |
| 4127836 | Tunable inductor coil A tunable inductor formed with a hard plastic tubular member having a low coefficient of friction. A length of wire is conventionally coiled about the outer surface of the tube or tubular member. A threaded tuning element is positioned in the tubular memb... | 11/28/1978 |
| 4121835 | Sound producing straw A sound producing device where a recorded sound track on the external surface of an elongate member, such as a drinking straw, produces sound as the straw is moved through a resilient lid of a container.... | 10/24/1978 |
| 4120323 | Polygonally wrapped sleeve, and methods and devices for making same The invention relates to packaging "sleeves," or multi-sided, tubular structures which may be used for packaging articles, as blanks for boxes, or the like, which are made from multiple layers of spirally wrapped strips of paper, fabric, or the like; whic... | 10/17/1978 |
| 4115616 | Self-sealing fuel line assembly A self-sealing multi-laminated fuel line composite material composed of (a) a plastic fuel line, (b) a precompressed and fuel sensitive foam bonded to said plastic line, and (c) a flexible, plastic laminate bonded on top of said foam.... | 09/19/1978 |
| 4111820 | Coating and methods for pulling cable and drawing wire A coating consisting essentially of 0.5% to 50%, preferably 2% to 20%, by volume, polyethylene oxide and about 6% to 30% a dispersion agent selected from the group consisting of propylene glycol, glycerol, ethylene glycol, polypropylene glycol, diethylene... | 09/05/1978 |
| 4106528 | Tube for fluid substances under pressure A composite pressure tube for the transport of hot fluid substances is proposed consisting of a very thin internal metal tube and a layer of mineral fibres, which are arranged in laminations wound cross-wise above each other and which carry at least the h... | 08/15/1978 |
| 4103800 | Backing material A low alloy nickel-manganese steel consists essentially of carbon 0.18-0.23 weight percent, manganese 0.70-0.90 weight percent, silicon 0.20-0.35 weight percent, chromium 0.40-0.60 weight percent, nickel 0.40-0.70 weight percent, molybdenum 0.15-0.25 weig... | 08/01/1978 |
