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 |
| 4153756 | Aluminum-base bearing alloy and composite An aluminum-base bearing alloy and a bearing material which is made by applying the bearing alloy to a backing steel by pressure welding. The aluminum-base bearing alloy is characterized in that the lowering of the hardness thereof under high temperature ... | 05/08/1979 |
| 4150179 | Hot dip aluminizing of steel strip This invention relates to a method and means for applying one or more coatings on to a substrate. The invention is particularly, but not exclusively, concerned with applying metal or alloy coatings on to metallic substrates in order to improve the formabi... | 04/17/1979 |
| 4150178 | Aluminum diffusion layer forming method The invention relates to a method of forming aluminum diffusion layer including the steps of dipping a ferrous base alloy workpiece containing nickel of more than 8.0% by weight in a molten metal bath of aluminum or aluminum alloy having temperature of 65... | 04/17/1979 |
| 4144378 | Aluminized low alloy steel An aluminum coated low alloy low carbon killed steel sheet material which exhibits increased resistance to subsurface oxidation at elevated temperatures having incorporated in the low carbon killed steel before rolling and hot-dip aluminum coating an amou... | 03/13/1979 |
| 4144379 | Drawing quality hot-dip coated steel strip A drawing quality hot-dip coated low carbon aluminum killed steel strip produced by conventional steel strip forming and continuous hot-dip coating procedures wherein the hot rolled coiling temperature is maintained within a temperature range of 1250° F.... | 03/13/1979 |
| 4141760 | Stainless steel coated with aluminum Aluminum diffusion can be effected from continuous coatings of leafing-type aluminum particles and such leafing coatings in very thin layers are more effective than coatings of non-leafing aluminum, with or without diffusion. Other protective metals in fl... | 02/27/1979 |
| 4135013 | Method for the prevention of stress corrosion cracking Equipment used in a substantially water free, but corrosive environment is protected from corrosion by coating only certain welded parts thereof with a metal more base than the metal part coated.... | 01/16/1979 |
| 4123594 | Metallic coated article of improved environmental resistance A metallic article is provided with improved resistance to high temperature environmental conditions, particularly hot corrosion resistance, through the interdiffusion with the article substrate of a complex graded coating including an inner portion which... | 10/31/1978 |
| 4117179 | Oxidation corrosion resistant superalloys and coatings An article of manufacture having improved high temperature oxidation and corrosion resistance comprising: (a) a superalloy substrate containing a carbide reinforcing phase, and (b) a coating consisting of chromium, aluminum, carbon, at least one element s... | 09/26/1978 |
| 4103076 | Clad metal product of Cu, Al and stainless steel A new clad metal product is provided consisting of a core having at least one layer each of copper and of aluminum and at least one outer cladding layer of stainless steel on the layer of aluminum.... | 07/25/1978 |
| 4099804 | Plain bearings This invention consists of a plain bearing in which the bearing surface consists of or includes poly-phenylene sulphide to give good bearing properties and also because such linings can be bonded to backings to steel or aluminium or aluminium alloys with ... | 07/11/1978 |
| 4090011 | Armor 1. Armor possessing high resistance to penetration, comprising a metallic composite having a layer of aluminous metal bonded to a layer of a precipitation-hardenable ferrous alloy, said composite in bonded condition being susceptible to a thermal hardenin... | 05/16/1978 |
| 4080486 | Coating system for superalloys A protective coating system is provided for nickel-base and cobalt-base superalloys which is capable of imparting oxidation and corrosion resistance at elevated temperatures. The superalloy body is first coated by physical vapor deposition with a composit... | 03/21/1978 |
| 4079157 | Method of fabrication of distortion-resistant material Method of fabrication of material suited for use in a thermal reactor according to which austenitic stainless steel is dipped in a bath of molten aluminium in addition of silicon and then receives heat treatment in specific temperature ranges, whereby pre... | 03/14/1978 |
| 4071643 | Method of manufacturing bearing material This invention is the production of a plain bearing having an aluminum interlayer and a metal overlay on the interlayer. The overlayer is for example cast on the interlayer so that it can constitute substantially the final bearing surface without machinin... | 01/31/1978 |
| 4070511 | Method of producing layers of lead and its alloys on workpieces made of ferrous alloys A method of producing layers of lead and its alloys on workpieces made of ferrous alloys comprising dipping the workpieces to be coated into a two-layer bath, the upper layer of which is a bath of aluminum or its alloys, and the bottom layer of which is a... | 01/24/1978 |
| 4066806 | Diffusion coating of ferrous metals A process is provided for the pack diffusion coating of ferrous metal articles with aluminum, wherein a small but effective amount of an energizer, aluminum chloride, is employed associated with a small but effective amount of a halide selected from the g... | 01/03/1978 |
| 4065625 | Lead frame for a semiconductor device A lead frame for a semiconductor device, wherein a semiconductor chip-mounting portion, inner lead portions to be connected to the electrodes of said chip and outer lead portions connected to the inner lead portions are each formed of an iron core strip, ... | 12/27/1977 |
| 4061801 | Method of producing aluminum or aluminum alloy coated steel sheets with aid of powder method A method of producing an aluminum or aluminum alloy coated steel sheet with the aid of powder method is disclosed. The method comprises preliminarily applying a zinc coating having a thickness of 0.01 to 0.3 μm, preferably 0.03 to 0.3 μm to a steel shee... | 12/06/1977 |
| 4056366 | Zinc-aluminum alloy coating and method of hot-dip coating A ferrous metal strip is continuously hot-dip coated by immersing the metal strip in a hot-dip coating bath containing between about 0.2 wt. percent and about 17 wt. percent aluminum, between about 0.02 wt. percent and about 0.15 wt. percent antimony whil... | 11/01/1977 |
| 4036600 | Steel substrate electroplated with Al powder dispersed in Zn A composite zinc-aluminum dispersion plated steel sheet and a method of producing same are disclosed. The plated steel sheet comprises an electrolytical zinc plated layer containing 1.5 to 70% by weight of aluminum dispersed therein. The method comprises ... | 07/19/1977 |
| 4027367 | Spray bonding of nickel aluminum and nickel titanium alloys An alloy of nickel and aluminum, which also may contain varying percentages of intermetallics, in the form of a wire or rod is sprayed in an electric arc spray gun to form a self-bonding coating on a smooth, clean substrate. Alternatively an alloy of nick... | 06/07/1977 |
| 4024567 | Semiconductor device having Al-Mn or Al-Mn-Si alloy electrodes A semiconductor device has a conductive layer for wiring which is made of an Al alloy containing Mn in an amount greater than 1 percent by weight and below 6 percent by weight. The semiconductor device has excellent corrosion resistance, and has a high re... | 05/17/1977 |
| 4015949 | Plain bearings This invention consists of a plain bearing in which the bearing surface consists of or includes poly-phenylene sulphide to give good bearing properties and also because such linings can be bonded of backings to steel or aluminum or aluminum alloys with a ... | 04/05/1977 |
| 4014417 | Conductor rail A conductor rail includes a load-bearing body of aluminum or an aluminum alloy, and a layer of steel metallically united to the body on the part of the rail to which electrical contact is to be made during use thereof, the steel layer conductively contact... | 03/29/1977 |
| 4008051 | Composite metal articles A metal article is formed by a sintered body of an austenitic ferrous alloy containing chromium and nickel, the ferrous alloy having been infiltrated with a copper or copper base alloy during or after sintering of the body. When a body of aluminum or aluminum ... | 02/15/1977 |
| 4005991 | Metal made of steel plate and aluminum material A metal casting made of a steel plate and an aluminum material mechanically interlocked with the steel plate. The metal casting has a resistance to wear, impact and/or elevated temperature, or has other required or desired characteristics such as good hea... | 02/01/1977 |
| 3973918 | Method of making a gas-fired furnace This specification discloses a method of making a high efficiency gas-fired furnace with aluminized steel heat exchangers which are specially prepared for higher heat exchange efficiency by heat treatment of the heat exchanger shells.... | 08/10/1976 |
| 3966426 | Cooking vessel for use with induction heating cooking unit The cooking vessel has a laminated wall including one layer of a magnetic material having a thickness, determined in accordance with skin depth as a function of the operating frequencies of the cooking device so that the major part of the power is develop... | 06/29/1976 |
| 3963451 | Method of forming a high-temperature abrasion-resistant coating on a ferrous metal substrate, and resulting article A method of forming a high-temperature abrasion-resistant hard facing or coating on a ferrous metal substrate by employing an aluminothermic reduction reaction. The resultant article has a hard facing layer containing from 2 to 8 percent boron. Hard faced... | 06/15/1976 |
| 3963531 | Cold rolled, ductile, high strength steel strip and sheet and method therefor Cold reduced, annealed steel strip and sheet stock having 0.2% yield strength of 45 to 65 ksi with an elongation of at least 25%, or having a yield strength of at least 90 ksi with an elongation of at least 10%. A low carbon steel (0.02-0.10% C) typical o... | 06/15/1976 |
| 3958994 | Photosensitive diazo steel lithoplate structure A lithographic printing plate structure and method of manufacture, in which a support sheet of steel, normally subject to corrosion in a lithographic environment, such as a mild steel, is coated, preferably on both sides, with aluminum, zinc or an aluminu... | 05/25/1976 |
| 3957608 | Process for the surface oxidisation of aluminum In the surface oxidisation of an aluminium coating deposited on a steel st there is provided a process in which the aluminium coated sheet is passed through an enclosure in which there is a vacuum of from 10-.sup.1 to 10-.sup.3 Torr... | 05/18/1976 |
| 3955936 | Heavy-duty aluminum bearing alloy A heavy-duty aluminum-base bearing alloy capable of being continuously cast and rolled into strip stock and comprised of about 2.5% to about 3.5% cadmium, about 1.0% to about 1.5% copper, about 0.75% to about 1.25% nickel, about 1.25% to about 1.75% manga... | 05/11/1976 |
| 3952120 | Aluminum-zinc coated low-alloy ferrous product and method Large steel products such as structural sections, castings, forgings and machined sections are coated with a smooth, adherent, bright metallic coating comprised of 25 to 85% aluminum, silicon in an amount of 0.7% or more by weight of the amount of aluminu... | 04/20/1976 |
| 3950141 | Sliding friction bearings A composite bearing comprising a backing layer, an intermediate layer of a good heat conducting, medium modulus of elasticity metal on said backing layer having a Vickers Hardness (Diamond Pyramid Hardness) in the range between approximately 30 [kp/mm | 04/13/1976 |
| 3948689 | Chromic-phosphoric acid coated aluminized steel Low temperature aluminum diffusion is of better quality when effected with a pack energized by aluminum chloride or other material that does not generate nitrogen and is shielded from contacting the work pieces until after the pack is heated to energizing... | 04/06/1976 |
| 3941569 | Method for making ferrous metal having improved resistances to corrosion at elevated temperatures and to oxidization A method for making ferrous metal having highly improved resistances to corrosion and to oxidization, which comprises hot-dipping a metallic workpiece in a molten aluminum or aluminum alloy bath, primary heat-treatment of the metallic workpiece and second... | 03/02/1976 |
| 3940262 | Reinforced foamed metal Foamed metal articles having reinforcing fibers, such as inorganic fibers; for example, fiberglass, refractory fibers, and metal fibers, dispersed in the foamed metal for strength improvement. Processes of manufacturing such fiber reinforced foamed metal ... | 02/24/1976 |
| 3938125 | Antipilferage system and marker therefor An antipilferage system utilizing markers comprising a sheet having both ferromagnetic and electrically conductive characteristics, which markers are detected upon passage through an interrogation zone within which are sequentially generated magnetic fiel... | 02/10/1976 |
