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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 4977576 | Safety flow stopper for water-cooled electrode A safety flow stopper in a water-cooled electric arc furnace electrode comprises a bob 16 held in place above a valve seat 12 by a release pin 17 resting on the bottom of the cavity in the nipple 20. If the electrode fails the release pin will no longer s... | 12/11/1990 |
| 4891279 | Fuel cell plate separator A porous graphite electrode for a fuel cell is formed by impregnation of a cellulosic filter paper by coating or impregnating with a low coke yield impregnant on the active center area and with a high coke yield impregnant on the edges, followed by curing... | 01/02/1990 |
| 4802188 | Water trap manifold for water cooled electrodes In a water cooled electrode assembly for an electric arc steel furnace, a water trap manifold 14 integral with the head assembly at the upper end of said electrode.... | 01/31/1989 |
| 4541912 | Cermet electrode assembly A cermet electrode assembly for use in an electrolytic cell is produced by the process of hot isostatic molding a cermet material onto a metal current member. The electrode assembly has long service life and can be joined to an electrical current source b... | 09/17/1985 |
| 4530853 | Non-conducting oxidation retardant coating composition for carbon and graphite A multiple coating composition is utilized to provide oxidation resistance for carbon or graphite articles during use in high temperature environments. A method for applying the composition is also provided.... | 07/23/1985 |
| 4529494 | Bipolar electrode for Hall-Heroult electrolysis A monolithic bipolar electrode for the production of primary aluminum by molten salt electrolysis is composed of a cermet anodic layer 10, a conductive and diffusion-resistant intermediate layer 14, and a refractory hard metal cathodic layer 20, with the ... | 07/16/1985 |
| 4526669 | Cathodic component for aluminum reduction cell A cathodic element for a Hall-Heroult aluminum reduction cell is formed from a refractory hard metal, preferably TiB2, in a generally mushroom-shaped configuration. The element is economical of raw materials and has improved thermal endurance w... | 07/02/1985 |
| 4513425 | Composite electrode for arc furnace A composite water-cooled electrode for electric arc steel furnaces comprises a tubular graphite body held in compression by means of tension stressed internal water supply pipe located between a metal header at one end and a hollow metal nipple at the oth... | 04/23/1985 |
| 4500401 | Anode retraction device for a Hall-Heroult cell equipped with inert anodes A compressed air-powered retractor for an inert anode in a Hall-Heroult cell is actuated after power interruption by a time delayed solenoid actuating a valve controlling the air supply to a cylinder connected to the anode support structure.... | 02/19/1985 |
| 4495049 | Anode for molten salt electrolysis An electrode for an electrochemical cell comprising a variable cermet composition, the portion in contact with the electrolyte having a relatively high ceramic content for maximum corrosion resistance and the portion attached to the external electrical ci... | 01/22/1985 |
| 4491510 | Monolithic composite electrode for molten salt electrolysis A non-consumable electrode having a substantially flat working surface suitable for use as an anode in molten salt electrolysis, particularly for the production of aluminum in Hall-Heroult reduction cells, is produced by a process wherein at least the por... | 01/01/1985 |
| 4490244 | Production of premium grade petroleum coke Graphite having a coefficient of thermal expansion of less than 5×10-7 cm/cm/°C. over the range of 0°-50° C. is produced from premium petroleum cokes. The cokes are produced from feedstocks selected and blended on the basis of high resoluti... | 12/25/1984 |
| 4490824 | Composite electrode for arc furnace A composite electric arc furnace electrode comprises a heavy-walled tubular graphite body with a sealed inner bore, a hollow nipple, a central coolant supply pipe, and a metal header assembly. If the unit fails, it is disassembled, a new graphite main tub... | 12/25/1984 |
| 4487863 | Reinforced polyester based resin system and method of fabrication Amino substituted acrylamide monomer is utilized as a coupling agent for reinforcing fibers and polyester base resin matrix in the production of thermosetting resin systems to enhance the bonding characteristics of the resin with the fiber while improving... | 12/11/1984 |
| 4484997 | Corrosion-resistant ceramic electrode for electrolytic processes A ceramic electrode suitable for use in an electrolytic cell has a conductive ceramic substrate of a base material and at least one additive material having a concentration greater than its solubility limit in the base material, and a coating of the base ... | 11/27/1984 |
| 4475207 | Graphitization furnace loading apparatus An apparatus 12 is specially adapted to conserve time, energy, labor and enhance safety when loading a column 10 of cylindrical carbon electrodes or carbon bodies of uniform cross section in end-abutting relationship into a lengthwise graphitization furna... | 10/02/1984 |
| 4472258 | Anode for molten salt electrolysis An electrode for an electrochemical cell comprising a variable cermet composition, the portion in contact with the electrolyte having a relatively high ceramic content for maximum corrosion resistance and the portion attached to the external electrical ci... | 09/18/1984 |
| 4466997 | Method of maintaining and repairing protective coatings for the high temperature zones of engines A method for maintaining and/or repairing a protective coating on the surfaces of at least one component in a high temperature zone of an engine during operation thereof wherein selected additives are employed in the engine's fuel.... | 08/21/1984 |
| 4465581 | Composite of TiB2 -graphite TiB2 -graphite composite articles suitable for use as cathode components in a Hall aluminum reduction cell are made by impregnating a TiO2 -carbon composite with a boron compound and carbon black dispersed in water, or alternately by... | 08/14/1984 |
| 4462889 | Non-consumable electrode for molten salt electrolysis A non-consumable cermet electrode for electrolytic proceses comprises at least about 75 vol. % of a hexagonal ferrite component ceramic composition and no more than about 25 vol. % of a metal component.... | 07/31/1984 |
| 4461159 | Apparatus for the stabilization of fibers The wall of an oxidizing chamber for the continuous thermal oxidative stabilization of organic fibers which undergo exothermic reaction during treatment thereof possesses high thermal conductance and has an internal surface of high total normal emissivity... | 07/24/1984 |
| 4451926 | Composite electrode for arc furnace A composite electrode for an electric arc smelting furnace has a metal liquid cooled upper clamped section, a consumable graphite lower section and a metal liquid cooled connecting pin. The upper section is fitted with loosely fitting arcuate graphite seg... | 05/29/1984 |
| 4443314 | Anode assembly for molten salt electrolysis An improved anode assembly for an aluminum electrolysis cell is formed by the process of shaping an anode 10 and a cermet connector 12 from powders, machining said articles, and sintering said articles. The cermet connector mates with the anode via a thre... | 04/17/1984 |
| 4439491 | Oxidation retardant for graphite Carbon or graphite is protected against oxidation by application of a solution comprising monoammonium phosphate, zinc orthophosphate, phosphoric acid, boric acid, cupric oxide, wetting agent in water.... | 03/27/1984 |
| 4439382 | Titanium diboride-graphite composites Titanium diboride graphite composite articles are produced by mixing TiO2, petroleum coke and a binder to form a plastic dispersion. Articles are shaped by molding or extrusion and baked to carbonize the binder to form a baked carbon-TiO2 | 03/27/1984 |
| 4430189 | Method of manufacturing aluminum in a Hall-Heroult cell Aluminum is manufactured in a Hall-Heroult cell employing a non-consumable anode having a substantially flat working surface produced by a process wherein at least the portion of a conductive core that is exposed to the electrolyte bath is coated with a c... | 02/07/1984 |
| 4427540 | Production of anode grade petroleum coke The oxidation resistance of carbon bodies formed from petroleum coke is increased by inhibiting the catalytic effects of vanadium and/or nickel impurities in the coker feedstock through utilization of an effective amount of an inorganic magnesium compound... | 01/24/1984 |
| 4417344 | Composite electrode for arc furnace A composite electrode for an arc smelting furnace comprising a water cooled aluminum upper clamped section 12, a hollow metal nipple 42, protected by refractory rings 46 in the unclamped area and a consumable graphite electrode 54.... | 11/22/1983 |
| 4416014 | Composite electrode for arc furnace A composite electrode for an electric arc smelting furnace has a metal liquid cooled upper clamped section, a consumable graphite lower section and a metal liquid cooled connecting pin. The upper section is fitted with rectangle-shaped tiles of graphite (... | 11/15/1983 |
| 4413860 | Composite disc Method of manufacture of discs of fiber-reinforced composite comprising layers of segments with axial and circumferential fiber alignment for superior stiffness and resistance to radial and circumferential stresses in the plane of the disc.... | 11/08/1983 |
| 4411748 | Anode and process for magnesium production An anode for use in the electrolytic production of magnesium comprises a graphite body having an essentially impermeable coating thereon of magnesium or magnesium-aluminum alloy.... | 10/25/1983 |
| 4394766 | Graphitization system method and apparatus Amorphous carbon bodies forming a lengthwise series horizontal string or column 26 are converted to graphite by the Joule effect in a semi-cylindrical metal shell 20 with a refractory lining 22 and containing particulate thermal insulation medium 28. When... | 07/19/1983 |
| 4379033 | Method of manufacturing aluminum in a Hall-Heroult cell Aluminum is manufactured in a Hall-Heroult cell employing a non-consumable anode having a substantially flat working surface produced by a process wherein at least the portion of a conductive core that is exposed to the electrolyte bath is coated with a c... | 04/05/1983 |
| 4377463 | Controlled atmosphere processing of TiB2 /carbon composites TiB2 -carbon composites are produced by mixing the raw materials comprised of carbon, TiB2, pitch, and other reactants, forming a shaped article, processing in a nitrogen atmosphere up to 2100° C., and in a noble gas above 2100° C.... | 03/22/1983 |
| 4376029 | Titanium diboride-graphite composits A cathode component for a Hall aluminum cell is economically produced from a mixture of a carbon source, preferably calcined petroleum coke, and optionally calcined acicular needle petroleum coke, calcined anthracite coal; a binder such as pitch including... | 03/08/1983 |
| 4375340 | Carbon electrode joint Thread material is removed from the non-load bearing flank of a selected number of threads on each side of the center thread of a nipple to provide increased strength for an electrode joint formed therewith.... | 03/01/1983 |
| 4369171 | Production of pitch and coke from raw petroleum coke Raw petroleum coke is treated with a solvent to extract the soluble matter. The extracted matter is useful as coker feedstock, fuel, pitch binder, pitch precursor, impregnant and carbon black feedstock. The coke residue may be used without further treatme... | 01/18/1983 |
| 4334980 | Non-puffing petroleum coke Very fine particle size iron oxide or calcium fluoride is dispersed in a high sulfur petroleum coker feedstock before delayed coking to produce a needle coke with low CTE and negligible puffing on heating to the temperature of graphitization.... | 06/15/1982 |
| 4332856 | Carbon or graphite article and method of making by impregnating with a lignin sulfonate complex In a process for producing carbon or graphite articles, baked carbonaceous articles are impregnated with an aqueous solution of lignin sulfonate complex prior to carbonization or graphitization. The carcinogenic effects of conventional impregnants are eli... | 06/01/1982 |
| 4312763 | Process for removal of solids from solvent refined coal solutions A method for separating solids from a liquefied coal slurry resulting from the SRC process utilizes an improved carbon filteraid material prepared by flash heating thermally expandable coal particles under controlled conditions.... | 01/26/1982 |
