Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7217327 | Method of producing metal member with enhanced corrosion resistance by salt bath nitriding A metal member is produced with enhanced corrosion resistance by salt bath nitriding. Specifically, in a nitriding salt bath containing Li+, Na+ and K+ ions as cation components and CNO− and CO3−− | 05/15/2007 |
| 7033448 | Method for preparing a nickel-base superalloy article using a two-step salt quench An article made of a nickel-base superalloy strengthened by the presence of a gamma-prime phase is prepared by solution heat treating the nickel-base superalloy at a solutionizing temperature above a gamma-prime solvus temperature of the nickel-base superalloy, ther... | 04/25/2006 |
| 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 |
| 5505786 | Method for treating surface oxides on a metal alloy strip A system for descaling a strip of metal includes a nozzle assembly mounted within a spray box for spraying descaling product on the strip. The nozzle assembly includes a spray chamber; nozzles mounted directly to the spray chamber; and a heater for heatin... | 04/09/1996 |
| 5377398 | Method for descaling metal strip utilizing anhydrous salt An improved salt and method of using such salt for conditioning scale on strip or sheet metal surfaces is provided. In more particular aspects, the invention provides an improved salt of alkali metal hydroxides and alkali metal nitrates which are used in ... | 01/03/1995 |
| 5340419 | Method and apparatus for densifying an article Method and apparatus for densifying an article wherein the article is disposed in a first molten salt pressure transmission medium in a container. The first medium is heated to a first elevated densifying temperature. The container is disposed in a second... | 08/23/1994 |
| 5326409 | System for peripheral differential heat treatemnt to form dual-property workpiece A system for developing a metal workpiece in which the center and the periphery have different properties. The workpiece is processed to put it into a first metallurgical condition. Then, a portion of the periphery is dipped into a molten salt bath and th... | 07/05/1994 |
| 5248354 | Method for the preparation of a body of austempered ductile cast iron A unique method is proposed for the preparation of a body of an austempered ductile cast iron having a gradient of the mechanical property within the body by subjecting a body of a nodular graphite cast iron to an isothermal transformation treatment for a... | 09/28/1993 |
| 5064478 | Method and apparatus for surface austempering of cast iron parts A method for producing a selectively surface hardened cast iron part includes uniformly heating the surface of the part by immersion into a molten metallic bath until a desired thickness of surface austenite is produced, and thereafter quenching the heate... | 11/12/1991 |
| 4954183 | Lead heat treatment of wire with prevention of lead entrainment Drag out of lead with elongated steel elements (1) upon exit from a bath (2) of molten lead is prevented by bringing the elongated steel elements into contact with an amount of a substance such as H2 S, Hcl or ZnCl2 /.nNH4... | 09/04/1990 |
| 4793869 | Continuous treatment of cold-rolled carbon manganese steel Cold-rolled, non-microalloyed carbon manganese steel (0.04% to 0.15% C, 0.25% to 0.70% Mn) is preheated at 700° to 1000° F., heated to 1625° to 1725° F., and quenched to 650° to 750° F. in a continuous process to develop minimum yield strength ... | 12/27/1988 |
| 4793870 | Continuous treatment of cold-rolled carbon high manganese steel Cold-rolled, non-microalloyed carbon manganese steel (0.11% to 0.18% C, 1.20% to 1.40% Mn) is preheated at 700° to 1000° F., heated to 1500° to 1575° F., and quenched to 800° to 950° F. in a continuous process to develop minimum yield strength ... | 12/27/1988 |
| 4627882 | Method of making a rotary drill bit A rotary drill bit comprising a roller cutter (13) rotatably carried over a bearing system, which comprises a friction bearing (14). For purposes of ensuring sufficient hardness of the cooperating friction surfaces and lubrication thereof and optimizing c... | 12/09/1986 |
| 4609410 | Method for producing high-strength deep-drawable dual-phase steel sheets High-strength, deep-drawable, steel sheet exhibiting dual-phase properties is produced by (i) initially annealing the sheet to achieve crystallographic textures yielding high deep drawability, (ii) heating the sheet to a temperature above the A1 | 09/02/1986 |
| 4473412 | Annealing steel strip using molten B2 O3, SiO2 Na2 O, NaF glass bath A process for annealing steel strip comprising dipping the strip in a molten glass bath maintained 950° C. or higher to anneal it, taking the strip out of the bath to form coagulated glass coatings on the surfaces of the strip and cooling the strip to de... | 09/25/1984 |
| 4431464 | Salt bath quenching method and apparatus The quench severity of a molten salt bath is drammatically increased by adding substantial amounts of water to the bath while it is being vigorously agitated by two impellors submerged in the bath. One impellor causes an upward flow and the other a downwa... | 02/14/1984 |
| 4160677 | Method of processing alloy steel strip In treating certain types of steel strip, it passes through a plurality of processes including a salt bath having a driven sink roll therein. In order to by-pass the salt bath the sink roll and its drive are raised while maintaining them horizontal. This ... | 07/10/1979 |
| 4098624 | Process for increasing the versatility of isothermal transformation An isothermal transformation process or method is disclosed for heat treating metals of the class which is characterized by having a time-temperature-transformation, or T-T-T Diagram or Isothermal Transformation Diagram. The process includes the steps of ... | 07/04/1978 |
| 4055446 | Salt bath quenching of construction parts treated with a nitriding bath Iron and steel construction parts which have been treated in a high cyanate, low cyanide or cyanide free nitriding salt bath or in other cyanide containing salt baths are tempered in a bath comprising an alkali metal hydroxide. There also can be present i... | 10/25/1977 |
| 4021272 | Method of isothermal annealing of band steels for tools and razor blades A method consisting in converting a coil of hot-rolled band steel for tools and razor blades into an open coil in which its convolutions are spaced apart from one another, and immersing the open coil in a series of salt baths. First of all, the open coil ... | 05/03/1977 |
