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 |
| 7358217 | Quenching oil compositions Quenching oil compositions comprising (1) an oil having kinematic viscosity (ASTM Test Method D-445) at 40° C. ranging from about 4 to about 45 mm2sec−1 (about 40 to about 210 Saybolt Universal Seconds (SUS)) and having a saturated content from about 80% to about... | 04/15/2008 |
| 7284461 | Colored razor blades Colored razor blades are provided. Methods for manufacturing such blades are also provided, including methods involving subjecting a blade material to a hardening process; and, during the hardening process, oxidizing the blade material to form an oxide layer on the ... | 10/23/2007 |
| 7156979 | Thermal cracking process using tubes, pipes, and coils made of novel stainless steel matrix A thermal cracking process using tubes, pipes, and coils made of. An outermost surface covering not less than 55% of stainless steel, said surface having a thickness from 0.1 to 15 microns and being a spinel of the formula MnxCr3-xO... | 01/02/2007 |
| 7067087 | System and process for gas recovery This invention is directed to a three-stage process for recovering and purifying a helium gas, and a system for using the three-stage process. The steps comprise a) introducing a gas from a cold spray forming chamber to a particulate removing apparatus to form a par... | 06/27/2006 |
| 7056399 | Passivation of steel surface to reduce coke formation The present invention provides a process to treat steels, preferably carbon steel to reduce the tendency of the steel to form coke when in contact with hydrocarbons at elevated temperatures. The steel may be first reduced then treated with a mixture of compounds whi... | 06/06/2006 |
| 6972058 | Heat treatment method and apparatus A method of heat treating tool steel by using a high intensity infrared heating source, said source being tungsten halogen heat lamps which operate in air, non-air and/or vacuum environments, and a tool steel heat treat system which includes a furnace containing sai... | 12/06/2005 |
| 6929668 | Process for production of hydrogen by partial oxidation of hydrocarbons The invention concerns a method for producing a gas mixture containing hydrogen and carbon monoxide, and optionally nitrogen, from at least a hydrocarbon such as methane, propane, butane or LPG or natural gas, which comprises performing a partial catalytic oxidation... | 08/16/2005 |
| 6848832 | Surface-treated rolling bearing and manufacturing method thereof In a rolling bearing put under a working circumstance in which water tends to intrude into lubricants, it has been known such a phenomenon that hydrogen ions formed by decomposition of the lubricants are adsorbed to raceway surfaces and accumulated as hydrogen atoms... | 02/01/2005 |
| 6837948 | Process of production of compressor shoe A process of production of a compressor shoe superior in durability and reduced in manufacturing cost, wherein a process of quenching the shoe is performed in a vacuum, inert gas, or modified gas so as to prevent oxidation of the chrome and manganese of the surface ... | 01/04/2005 |
| 6547898 | Method of making safe a heat treatment enclosure operating under a controlled atmosphere Method of making safe a heat treatment enclosure operating under a gas atmosphere, the said enclosure comprising a cooling chamber for rapidly cooling a metal strip running from an upstream chamber to a downstream chamber by means of a plurality of guide ... | 04/15/2003 |
| 6531000 | Surface treated rolling bearing and manufacturing method thereof The present invention provides a rolling bearing in which an oxide layer of an iron/chromium oxide series is formed at a thickness of from 1 to 1000 nm to at least one of raceway surfaces of bearing rings or rolling contact surfaces of rolling elements an... | 03/11/2003 |
| 6214136 | Light-alloy casting heat treatment method The film boiling state of a refrigerant is maintained for a time longer than in the prior art by t to lower the nuclear boiling start temperature to a temperature at which the material proof strength of a work exceeds thermal stress, thereby lowering the ... | 04/10/2001 |
| 6210499 | Method of bright annealing metals having a high affinity to oxygen To be able to satisfactorily bright-anneal metals having a high affinity to oxygen in a hood-type furnace or the like under a protective gas, a rather pure inert gas such as argon, neon or helium, which is mixed with not more than 50 vol-% of a reducing g... | 04/03/2001 |
| 6143098 | Process and plant for thermal treatment of metals in protecting atmosphere A protective atmosphere for the heat-treatment of metals is obtained by heating a reactor containing a Nickel-based catalyst to a temperature of between 1000° C. and 1200° C., feeding to the reactor a flow of nitrogen having an oxygen content of between... | 11/07/2000 |
| 6024809 | Fe-Ni alloy materials for electronic parts Fe--Ni alloy with improved etch factors for electronic parts are provided which are characterized by the composition consisting of, all by weight, 30-55% Ni, 0.8% or less Mn, 0.0030-0.0100% N, or 0.02% less Al, and the balance Fe and unavoidable impuritie... | 02/15/2000 |
| 5938866 | Method and an apparatus for the treatment of components by a gas mixture An apparatus for the treatment of components by means of a gas mixture, comprising mainly a first light gas and minor amounts of a second gas being heavier than the first gas, has a treatment chamber (10) in which the treatment occurs and a concentration,... | 08/17/1999 |
| 5820705 | Spray quenching of metal with liquid coolant containing dissolved gas A method of quenching a metal object having steps of: (a) providing a liquid coolant having a temperature from about 100° F. to about 180° F. and containing about 0.01 to about 0.1 standard cubic feet of carbon dioxide gas per gallon of water dissolved ... | 10/13/1998 |
| 5807613 | Method of producing reactive element modified-aluminide diffusion coatings There is disclosed a process for forming aluminide diffusion coatings containing reactive elements on metal substrates such as iron, nickel or cobalt based alloys for protection against high temperature oxidation or corrosive environments. The process inc... | 09/15/1998 |
| 5798007 | Process and apparatus for the continuous heat treatment of a metal strip travelling in a different atmosphere Process for the continuous heat treatment of a metal strip, the latter travelling through a furnace, which is thermally insulated, and in a protective atmosphere; the said furnace consisting of at least one section, for heating, for temperature hold and f... | 08/25/1998 |
| 5779826 | Method for forming heat treating atmospheres The present invention is directed to a method for forming a heat treating atmosphere in which a nitrogen rich gas containing small amounts of oxygen is preheated. An oxygen-reactive gas, such as a hydrocarbon gas, is combined with the nitrogen rich gas an... | 07/14/1998 |
| 5730813 | Process for annealing an annealing charge and suitable annealing furnace Annealing is performed in the annealing chamber (2) of the annealing furnace (1) under a protective gas atmosphere. A partial-stream cleaning device (3) for the protective gas is connected to the annealing chamber. The protective gas can be cooled, the co... | 03/24/1998 |
| 5681407 | Method of heat treating metal with liquid coolant containing dissolved gas A method of quenching a metal object comprising: (a) providing a reservoir of liquid coolant containing gas that has been dissolved therein; and (b) immersing the metal object in the reservoir to quench the metal. The gas is selected from the group consis... | 10/28/1997 |
| 5614039 | Argon employing heat treating process Method for heat treating a metal in which argon gas is selectively injected into the cooling zone of a heat treating apparatus when the temperature therein is above the level at which significant nitriding will occur.... | 03/25/1997 |
| 5605587 | Apparatus for magnetic conditioning of liquids and methods of making same Martensitic steel components of apparatus for magnetic conditioning of liquids which are subjected to cathodic reaction and degradation are treated prior to use to form a barrier of iron-chromium oxide and a uniform level of hardness throughout by heating... | 02/25/1997 |
| 5536338 | Method of annealing iron-based products comprised of carbon steel rich in chromium and manganese A method of annealing of siderurgical products comprised of carbon steel having a chromium content in the range 0.15-1.5 wt. % and a manganese content also in the range 0.15-1.5 wt. %, whereby said products are held in an annealing furnace under nitrogen ... | 07/16/1996 |
| 5522949 | Class of ductile iron, and process of forming same A new class of ductile iron is formed by the hot isostatic pressing of a ductile iron casting, followed by austempering of the ductile iron casting. Hot isostatic pressing can be carried out at a pressure in the range of 10,000 to 17,000 psi at a temperat... | 06/04/1996 |
| 5487796 | Method of quenching metals A method of quenching metals, in particular steel alloys includes treatment of the article being quenched in a boiling aqueous solution of sodium tetraborate, with gas being additionally introduced into the quench bath. The supply of gas enables a continu... | 01/30/1996 |
| 5456773 | Heat treatment process for metal articles A heat treatment process in a roll type furnace for metal articles, in which the articles are heated in stages up to 800°-850° C. in several pre-heating zones with atmospheres containing free oxygen; the articles are heated in a high temperature zone in... | 10/10/1995 |
| 5401339 | Atmospheres for decarburize annealing steels A process for producing low-cost atmospheres suitable for decarburize annealing carbon steels from non-cryogenically generated nitrogen containing up to 1.54 residual oxygen by catalytically deoxygenating a non-cryogenically generated nitrogen stream at l... | 03/28/1995 |
| 5344509 | Process for prevent the formation of adhesives when annealing steel band A process to prevent the formation of adhesives when annealing a steel band having a low carbon content uses an inert gas consisting of nitrogen and hydrogen and includes the phases of heating up, holding time and cooling. The process is characterized in ... | 09/06/1994 |
| 5290369 | Method of gas sulphonitriding A sliding member is sulphonitride by heating at 480°-600° C. in the presence of both 10-500 ppm of a hydrogen sulfide gas and a 20-70 vol % ammonia gas, or by a method which comprises performing a primary heat treatment on the sliding member at 450°-54... | 03/01/1994 |
| 5173124 | Rapid gas quenching process Increased cooling rate of an article heated to an elevated temperature is achieved by flowing an inert gas mixture of helium and another inert gas over the article under conditions of turbulent flow.... | 12/22/1992 |
| 5167735 | Process for the annealing of steel annealing material For the annealing of steel in continuously operating units, the formation of so-called white dust is almost completely eliminated by subjecting the steel to a deoxidizing pretreatment before the annealing sequence so as to at least largely remove the oxyg... | 12/01/1992 |
| 5158625 | Process and apparatus for heat treating articles while hardening in gaseous medium Process for heat treating articles by hardening them in a recirculating gas medium which is in contact with the treated articles, the hardening gas being cooled by means of a heat exchanger, of the type in which helium is used as hardening gas, and is sto... | 10/27/1992 |
| 5057164 | Process for thermal treatment of metals Process for thermal treatment of metals by passage of metallic pieces into an elongated zone under a controlled atmosphere, having an upstream section at an elevated temperature, where the controlled atmosphere comprises nitrogen and reductive chemicals, ... | 10/15/1991 |
| 5049185 | Method and arrangement for supplying liquid to an oven The disclosure relates to a method for supplying, with a lance (11), a liquid to a heat treatment oven, the liquid being vaporized by the oven heat and being introduced into the oven with the aid of a carrier gas, and a lance (11) for carrying the method ... | 09/17/1991 |
| 4992112 | Annealing and quenching method Annealing and quenching method and apparatus for the implementation of the method. An annealing and quenching method for materials or parts referred to as a charge that is finish-annealed in a vacuum annealing plant and that then proceeds into a sluice ch... | 02/12/1991 |
| 4867808 | Heat treating a metallic workpiece by quenching under cooling gas under above atmospheric pressure and specified circulation rate A process for heat treatment of metallic workpieces by heating in a vacuum furnace followed by quenching in a coolant gas under above-atmospheric pressure and with coolant-gas circulation.... | 09/19/1989 |
| 4840680 | Method for degreasing a cold rolled metallic band A method of degreasing a cold rolled metallic band, through the chemical effect of an atmosphere of a determined composition, according to which the heating and degreasing actions are separated, wherein the heating is carried out in an enclosure provided ... | 06/20/1989 |
| 4830684 | Process for heat treating a carbon steel wire A process for heat treating a carbon steel wire to obtain a fine pearlite structure is characterized by the following steps: (a) cooling the wire until the wire reaches a given temperature which is below the AC1 transformation temperature; (b) ... | 05/16/1989 |
