Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 4451436 | Nitrogen fixation by plasma and catalyst A system and a method of nitrogen fixation is disclosed in which nitrogen and other gases such as oxygen are electrically activated and reacted on a catalyst-like material to provide a fixed nitrogen product in such a way that the reactant gases are first... | 05/29/1984 |
| 4443489 | Method for the formation of phosphorous-nitrogen based glasses useful for the passivation of III-V semiconductor materials A method for the chemical vapor deposition of amorphous, glass-like, phosphorous-nitrogen based films on the surface of a substrate is disclosed. The process entails exposing the substrate to a reactant gas stream comprising phosphorous, nitrogen and hydr... | 04/17/1984 |
| 4420498 | Method of forming a decorative metallic nitride coating There is disclosed a method for forming a decorative metallic nitride coating on the surface of a substrate comprising the steps of disposing said substrate to be coated as a cathode in a material gas atmosphere at a pressure of 0.1 to 10 Torr, with said ... | 12/13/1983 |
| 4394234 | Method of processing electrically conductive material by glow discharge A glow discharge surface treatment process wherein only the selected portions of a workpiece adjacent to or surrounded by the associated secondary electrodes are surface-treated so as to provide different treatments on the workpiece according to the posit... | 07/19/1983 |
| 4357182 | Chromization of steels by gas process A process for the chromization by gas of steels containing more than 0.2% of carbon, consisting of three successive treatments, the chromization treatment proper employing a cement having a ferrochrome base containing between 1% and 3% of carbon, and pref... | 11/02/1982 |
| 4333962 | Method for producing gold color coatings A method of controlling color hues of coatings particularly gold color coatings on substrate using a housing capable of being evacuated, and having an evacuated chamber, a hot cathode chamber in communication with the evacuated chamber and a support struc... | 06/08/1982 |
| 4326898 | Method for forming material surfaces Material surfaces are provided which maintain their characteristic properties over long periods and which resist degradation by the environment in which they are utilized. The surfaces are formed by exposing a surface of atomically clean material to a gas... | 04/27/1982 |
| 4298629 | Method for forming a nitride insulating film on a silicon semiconductor substrate surface by direct nitridation In a method for forming an insulating film on a semiconductor substrate surface, the silicon nitride of the insulating film has been formed by a plasma CVD or a direct nitridation. In the present invention, a gas plasma of a nitrogen-containing gas is gen... | 11/03/1981 |
| 4277320 | Process for direct thermal nitridation of silicon semiconductor devices A process for the direct thermal nitridation of silicon semiconductor devices in which the semiconductor body is placed in an atmosphere of N2, at a temperature of less than 1000° C. The N2 is activated by an RF electrical field whi... | 07/07/1981 |
| 4254159 | Method of producing gold-color coatings A method of producing gold-color coatings on substrates by evaporating a coating material comprising a metallic titanium or zirconium in a housing which has walls which define an evaporation space, comprises, maintaining a vacuum atmosphere containing N | 03/03/1981 |
| 4242151 | Chromizing of steels by gaseous method The object of the present invention is an improvement in chromizing methods, constituted by a method of chromizing steels to a depth e greater than 30 microns, usable for steels with a carbon content of at least 0.2%, especially for steels for constructio... | 12/30/1980 |
| 4212687 | Ion-nitriting process An ion-nitriding process in which workpieces are subjected to a two-step glow discharge in a nitrogen and hydrogen atmosphere, there being a larger nitrogen to hydrogen ratio in the second step.... | 07/15/1980 |
| 4200805 | Multicathode thermochemical processing oven A multicathode thermochemical processing oven for the treatment of articles or metals such as steel or steel alloys by subjection thereof to ionic bombardment. The oven structure includes at least one anode and a plurality of cathodes which form individua... | 04/29/1980 |
| 4181541 | Thermochemical treatment system and process Thermochemical Treatment System and Process for the treatment of steel or steel alloys by ionic bombardment. Two successive stages of operation are involved in which during the first stage, a DC voltage is applied across the electrodes of a furnace so tha... | 01/01/1980 |
| 4179617 | Ion-nitriding apparatus An ion-nitriding apparatus wherein heating and nitriding of workpieces can be carried out at high thermal efficiency, with excellent uniformity and in a short time by the combined use of glow discharge and heat generated by a heat-producing element. Heati... | 12/18/1979 |
| 4179618 | Apparatus for ion-nitriding treatment An ion-nitriding apparatus which is designed so that in heating and nitriding a workpiece by the combined use of glow discharge and heat generated by a heat-producing element, uniform temperature distribution of the workpiece during glow discharge can be ... | 12/18/1979 |
| 4139595 | Producing nitric oxide and nitric acid This invention is based on the factors that both oxygen gas and nitrous oxides as gas are paramagnetic; as well as are quite soluble in saturated halogenated hydrocarbon liquids; whereas nitrogen is not paramagnetic; thus providing a means of separation o... | 02/13/1979 |
| 4062748 | Method and apparatus for producing ozone Apparatus for producing ozone, wherein air or oxygen is passed through two high voltage electrodes mounted opposite each other in a housing and is converted into ozone by electrical discharge. The housing is constructed as a slender tube open at both ends... | 12/13/1977 |
| 4056007 | Arrangement for treating workpieces by corona discharge with short-circuit prevention feature Short-circuit prevention is provided in an arrangement for measuring temperatures of workpieces to be nitrided. An electrical potential gradient is established between a workpiece and a container in which the workpiece is accommodated so as to heat the wo... | 11/01/1977 |
| 4036720 | Hydrogen isotope separation A method of separating isotopes of hydrogen which comprises subjecting a ture of nitrogen and isotopes of hydrogen in a H2 --N2 mole ratio from 1:4 to 10:1 to a glow electrical discharge from 10.sup.-3 to 10+.sup.1 | 07/19/1977 |
| 3965184 | Novel materials containing nitrogen Compositions of matter including the structural unit ##EQU1## wherein R.sub. F ' is a divalent polyfluoroalkylene group having a chain length of from 1 to 4 carbon atoms which may be substituted at one or more positions with chloro-or polyfluoroalkyl... | 06/22/1976 |
