Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 5457088 | Process for the preparation of a semiconductor from an oxalate To prepare a phase-pure, ceramic oxide superconductor which contains, in addition to copper, at least one alkaline earth metal from the group comprising Ba, Sr and Ca, and at least one metal from the group comprising Y, La, Tl, Pb and the rare earths, for... | 10/10/1995 |
| 5449660 | Method of producing compound oxide by using partly citrating process A method of producing a compound oxide of elements including at least one of thallium, bismuth, lead, antimony, yttrium, each of rare earth elements, each of transition metal elements, each of alkali metal elements and each of alkaline earth metal element... | 09/12/1995 |
| 5395821 | Method of producing Pb-stabilized superconductor precursors and method of producing superconductor articles therefrom Metal oxide superconductor powder precursors are prepared in an aerosol pyrolysis process. A solution of the metal cations is introduced into a furnace at 600°-1000° C. for 0.1 to 60 seconds. The process produces micron to submicron size powders without... | 03/07/1995 |
| 5334557 | Method of preparing YBa2 Cu3 O7 powder for forming by drawing-lamination A method of preparing a powder of YBaCuO [phase 123] suitable for forming by drawing-lamination, which includes: preparing a powdered reactive mixture of precursors of purity greater than 99% and with a stoichiometry accurate to within less than 1%, binding th... | 08/02/1994 |
| 5290759 | Process for making high temperature superconducting powders Superconducting precursors, which can be made into metal oxide superconductors such as YBa2 Cu3 O6+x, and a process for their manufacture by the coprecipitation of 1-2-3 nitrates using inexpensive precipitating agents such... | 03/01/1994 |
| 5252314 | Method for producing coprecipitated multicomponent oxide powder precursors using guanidine oxalate as precipitating agent Guanidine oxalate is used as a precipitating agent in the coprecipitation of multicomponent oxide powder precursors. A solution of a soluble inorganic salt is combined with a solution of guanidine oxalate. A resultant metal oxalate is precipitated from th... | 10/12/1993 |
| 5244872 | Method of preparing Pb-Sr-Ca-Ln-Ca-O metal oxide superconductor An oxide superconductor having the following formula: Pb2 Sr2 Ca1-p Lnp Cu3 Oq or Pb1-x Cux Sr2 Ca1-y Lny Cu2 Oz wherein Ln rep... | 09/14/1993 |
| 5238914 | Process for producing a high-temperature superconductor containing bismuth, strontium, calcium and copper The invention relates to a process for producing a bismuth-, copper-, strontium- and calcium-containing high-temperature superconductor, in which an aqueous solution is produced which has a pH of 0.5-4 and which contains the metals in an atomic ratio corr... | 08/24/1993 |
| 5206215 | Process for obtaining precursors for high critical temperature superconductor ceramics comprising a first and second precipitation A process for obtaining precursors for high critical temperature superconductor ceramics by precipitating salts which are insoluble in water comprises the following stages: A starting solution of soluble salts is prepared in which the cations are in the s... | 04/27/1993 |
| 5200390 | Co-precipitation process for preparing superconductor powder A fine stoichiometric superconductor powder may be co-precipitated from the addition of appropriate metal compound powders in ammonium carbonate. The co-precipitated powder is very homogeneous because the reaction progresses in liquid solution. For exampl... | 04/06/1993 |
| 5162299 | Preparation of superconducting oxide precursor materials by pyrolysis from concentrated nitric acid solution A superconducting oxide precursor material is prepared by dissolving soluble compounds containing the non-oxygen elements of the oxide in concentrated nitric acid, in which a decomposing agent for the nitrate of the nitric acid selected from urea and sucr... | 11/10/1992 |
| 5152973 | Synthesis of submicron powders under reduced oxygen pressure The invention process provides a metal oxide, or oxides of more than one more metal, wherein the oxides have a mean particle size less than 1 micron. The oxides are made by steps including (1) reacting an aqueous solution of a metal salt (or salts) that f... | 10/06/1992 |
| 5149682 | Manufacturing method for superconducting ceramics and products thereof Superior homogeneity in ceramic materials is achieved by reacting certain soluble metal salts with quaternary ammonium carbonates to form co-precipitated metal carbonates. The precipitate can be recovered and processed to make superconductors. For example... | 09/22/1992 |
| 5147848 | Precipitation process for forming Bi-Pb-Sr-Ca-Cu-O superconductors by dissolving nitrate salts in acid and adding a solution of triethylamine and oxalic acid A process for preparing powder of high temperature oxide superconductors of Bi-Pb-Sr-Ca-Cu-O type. In an aqueous solution of nitrate salts of Bi, Pb, Sr, Ca, and Cu metals, an appropriate ratio of triethylamine/oxalic acid was added to form a coprecipitat... | 09/15/1992 |
| 5135907 | Manufacture of high purity superconducting ceramic A method for the manufacture of superconducting polycrystalline ceramic materials by the decomposition of a mixture of isopropoxides.... | 08/04/1992 |
| 5122508 | Coprecipitation process for preparing raw material powder for Y1 Ba2 Cu3 Ox oxide superconductor A process for preparing a bulk powder for an oxide superconductor which comprises mixing an alcohol solution (I) of a copper nitrate and a lanthanoid metal nitrate with an alcohol solution (II) comprising at least one compound selected from the group cons... | 06/16/1992 |
| 5122510 | Method for preparing rare earth-barium-cuprate pre-ceramic resins and superconductive materials prepared therefrom A method of making high Tc 1-2-3 superconductors having perovskite structure using solution techniques is disclosed. The process uses two solvent systems to form a resinous preceramic material having a controlled viscosity for facilitating its ... | 06/16/1992 |
| 5114911 | Homogeneous coprecipitation method for preparing YBaCuO superconducting powder An oxalate route coprecipitation process for preparing a superconducting YBaCuO system precursor powder comprises preparing an aqueous solution of nitrates of yttrium, barium and copper, which is then mixed with an organic solution containing a dibasic ox... | 05/19/1992 |
| 5100871 | Method for preparing rare earth-barium-cuprate pre-ceramic resins and superconductive materials prepared therefrom A method of making high Tc 1-2-3 superconductors having perovskite structure using solution techniques is disclosed. The process uses two solvent system to form a resinous pre-ceramic material having a controlled viscosity for facilitating its ... | 03/31/1992 |
| 5077265 | Co-precipitation synthesis of precursors to bismuth-containing superconductors A co-precipitation synthesis of precursors to bismuth-containing ceramic superconducting materials is disclosed in which bismuth and at least one other approrpiate metal are dissolved in a non-aqueous acidic solvent, which are then recovered as a homogene... | 12/31/1991 |
| 5061683 | Process for making superconductors using barium hydroxide There is disclosed an improved process for preparing a superconducting composition having the formula Mw Az Cuv Ox wherein M is selected from the group consisting if Bi, Tl, Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm Yb ... | 10/29/1991 |
| 5028585 | Superconducting oxide FCC oxide composite compositions and method of making such compositions Two or more superconductors are reacted together to form a non-superconducting phase encapsulating a residual superconducting phase. For example YBa2 Cu3 oxide is reacted with Bi2 Sr2 CaCu2 oxide to f... | 07/02/1991 |
| 5023067 | Manufacturing method for ceramics and products thereof An extremely pure oxide containing two or more metals, homogeneous at the atomic level, is prepared by (1) reacting in water, soluble salts of two or more metals with quaternary ammonium carbonate; the metals being those that form water-insoluble carbonat... | 06/11/1991 |
| 5019555 | High purity superconducting compositions and methods for their fabrication The present invention is related to a composition and methods for producing highly pure, high temperature superconducting materials having the general formula MBa2 Cu3 O7-x, where M is yttrium or a rare earth element and x... | 05/28/1991 |
| 5011822 | Preparation of a uniform mixed metal oxide and superconductive oxides A method for producing uniform mixed metal oxides, such as superconducting mixtures including Y1 Ba2 Cu3 O7-x, in which such metals are precipitated as their oxalates from alcoholic solutions of the metals as th... | 04/30/1991 |
| 5002926 | Ceramic composition Improved process for making Tl-Ca-Ba-Cu oxide superconductors. A solution of the nitrated of Ca, Ba, and Cu is reacted with a quaternary ammonium carbonate in a slurry (heel) of Tl2 O3. Carbonates of Ca, Ba, and Cu precipitate homoge... | 03/26/1991 |
| 5001107 | Method for the preparation of thallium-containing superconducting materials by precipitation This invention provides improved methods for the preparation of precursor powders that are used in the preparation of superconducting ceramic materials that contain thallium. A first solution that contains the hydrogen peroxide and metal cations, other th... | 03/19/1991 |
| 5001109 | Ceramic composition Improved process for making Bi-Pb-Sb-Sr-Ca-Cu oxide superconductors. A solution of the nitrates of Bi, Pb, Sr, Ca, and Cu is reacted with a quaternary ammonium carbonate in a dispersion (heel) of Sb2 O5. Carbonates of Bi, Pb, Sr, Ca,... | 03/19/1991 |
| 4975415 | Cryochemical method of preparing ultrafine particles of high-purity superconducting oxides The present invention pertains to a method of preparing particles of superconducting ceramic powders, which method comprises: (a) dissolving the soluble salts of the cations in aqueous medium; (b) obtaining a solution having pH of between about 4 and 7 by optionall... | 12/04/1990 |
| 4956340 | Process for preparing compound metal oxides of yttrium, barium and copper A process for preparing compound metal oxides, superconductive compound oxides, is disclosed. The process comprises preparing an aqueous solution containing a predetermined content ratio of chloride, nitrate or acetate of a rare earth metal, an alkaline e... | 09/11/1990 |
| 4904638 | Method of producing superconducting ceramics by co-precipitation of carbonates A process is disclosed for producing a homogeneous mixture of co-precipitated carbonate salts capable of reacting together in an oxygen atmosphere at an elevated temperature to form a superconducting ceramic which comprises forming a first solution by dis... | 02/27/1990 |
| 4895832 | Coprecipitation method for producing superconducting oxides of high homogeneity A homogenous coprecipitation method by which superconducting oxides having perovskite-like structure, such as YBa2Cu307-x, can be produced in mass, in which urea is used as solvent to adjust and control the PH value of an aqueous nitrate solution. The cop... | 01/23/1990 |
