Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 4857739 | Packet personal radiation monitor A personal radiation monitor of the chirper type is provided for detecting ionizing radiation. A battery powered high voltage power supply is used to generate and apply a high voltage bias to a G-M tube radiation sensor. The high voltage is monitored by a... | 08/15/1989 |
| 4849169 | High temperature creep resistant austenitic alloy An improved austenitic alloy having in wt % 19-21 Cr, 30-35 Ni, 1.5-2.5 Mn, 2-3 Mo, 0.1-0.4 Si, 0.3-0.5 Ti, 0.1-0.3 Nb, 0.1-0.5 V, 0.001-0.005 P, 0.08-0.12 C, 0.01-0.03 N, 0.005-0.01 B and the balance iron that is further improved by annealing for up to 1... | 07/18/1989 |
| 4847008 | Lead iron phosphate glass as a containment medium for disposal of high-level nuclear waste Lead-iron phosphate glasses containing a high level of Fe2 O3 for use as a storage medium for high-level radioactive nuclear waste. By combining lead-iron phosphate glass with various types of simulated high-level nuclear waste, a hi... | 07/11/1989 |
| 4846964 | Fluidized-bed bioreactor process for the microbial solubiliztion of coal A fluidized-bed bioreactor system for the conversion of coal into microbially solubilized coal products. The fluidized-bed bioreactor continuously or periodically receives coal and bio-reactants and provides for the production of microbially solubilized c... | 07/11/1989 |
| 4840904 | Recovery and reuse of cellulase catalyst in an exzymatic cellulose hydrolysis process A process for recovering cellulase from the hydrolysis of cellulose, and reusing it in subsequent hydrolyois procedures. The process utilizes a commercial adsorbent that efficiently removes cellulase from reaction products which can be easily removed by s... | 06/20/1989 |
| 4840816 | Method of fabricating optical waveguides by ion implantation doping A method for fabricating high-quality optical waveguides in optical quality oxide crystals by ion implantation doping and controlled epitaxial recrystallization is provided. Masked LiNbO3 crystals are implanted with high concentrations of Ti do... | 06/20/1989 |
| 4840931 | Method of inducing surface ensembles on a metal catalyst A method of inducing surface ensembles on a transition metal catalyst used in the conversion of a reactant gas or gas mixture, such as carbon monoxide and hydrogen into hydrocarbons (the Fischer-Tropsch reaction) is disclosed which comprises adding a Lewi... | 06/20/1989 |
| 4839316 | Protective coating for alumina-silicon carbide whisker composites Ceramic composites formed of an alumina matrix reinforced with silicon carbide whiskers homogenously dispersed therein are provided with a protective coating for preventing fracture strength degradation of the composite by oxidation during exposure to hig... | 06/13/1989 |
| 4839140 | Chromium modified nickel-iron aluminide useful in sulfur bearing environments An improved nickel-iron aluminide containing chromium and molybdenum additions to improve resistance to sulfur attack.... | 06/13/1989 |
| 4832704 | Method for enhancing the desulfurization of hot coal gas in a fluid-bed coal gasifier A process and apparatus for providing additional desulfurization of the hot gas produced in a fluid-bed coal gasifier, within the gasifier. A fluid-bed of iron oxide is located inside the gasifier above the gasification bed in a fluid-bed coal gasifier in... | 05/23/1989 |
| 4826966 | Radioiodinated branched carbohydrates A radioiodinated branched carbohydrate for tissue imaging. Iodine-123 is stabilized in the compound by attaching it to a vinyl functional group that is on the carbohydrate. The compound exhibits good uptake and retention and is promising in the developmen... | 05/02/1989 |
| 4818485 | Radiation resistant austenitic stainless steel alloys An austenitic stainless steel alloy, with improved resistance to radiation-induced swelling and helium embrittlement, and improved resistance to thermal creep at high temperatures, consisting essentially of, by weight percent: from 16 to 18% nickel; from ... | 04/04/1989 |
| 4818448 | Method for fabricating light weight carbon-bonded carbon fiber composites Ultralight carbon-bonded carbon fiber composites of densities in the range of about 0.04 to 0.10 grams per cubic centimeter are fabricated by forming an aqueous slurry of carbonaceous fibers which include carbonized fibers and 0-50 weight percent fugitive... | 04/04/1989 |
| 4812280 | Process for fabrication of large titanium diboride ceramic bodies A process for manufacturing large, fully dense, high purity TiB2 articles by pressing powders with a sintering aid at relatively low temperatures to reduce grain growth. The process requires stringent temperature and pressure applications in th... | 03/14/1989 |
| 4812577 | Mercuric acetate phenyl maleimide useful for preparing radiohalogenated maleimides A mercuric maleimide is utilized as a pharmaceutical kit for preparing radiohalogenated maleimides.... | 03/14/1989 |
| 4800183 | Method for producing refractory nitrides A process for making fine, uniform metal nitride powders that can be hot pressed or sintered. A metal salt is placed in a solvent with Melamine and warmed until a metal-Melamine compound forms. The solution is cooled and the metal-Melamine precipitate is ... | 01/24/1989 |
| 4799036 | Radio frequency coaxial feedthrough An improved radio frequency coaxial transmission line vacuum feed-through provided based on the use of a half-wavelength annular dielectric pressure barrier disk, or multiple disks comprising an effective half wavelength structure to eliminate reflection... | 01/17/1989 |
| 4795884 | Method for in-situ restoration of plantinum resistance thermometer calibration A method is provided for in-situ restoration of platinum resistance thermometers (PRT's) that have undergone surface oxide contamination and/or strain-related damage causing decalibration. The method, which may be automated using a programmed computer con... | 01/03/1989 |
| 4792724 | Gas mixtures for spark gap closing switches Gas mixtures for use in spark gap closing switches comprised of fluorocarbons and low molecular weight, inert buffer gases. To this can be added a third gas having a low ionization potential relative to the buffer gas. The gas mixtures presented possess p... | 12/20/1988 |
| 4789542 | Radioiodinated glucose analogues for use as imaging agents A radioiodinated branched carbohydrate for tissue imaging. Iodine-123 is stabilized in the compound by attaching it to a vinyl functional group that is on the carbohydrate. The compound exhibits good uptake and retention and is promising in the developmen... | 12/06/1988 |
| 4786291 | Method for increasing steam decomposition in a coal gasification process The gasification of coal in the presence of steam and oxygen is significantly enhanced by introducing a thermochemical water-splitting agent such as sulfuric acid, into the gasifier for decomposing the steam to provide additional oxygen and hydrogen usabl... | 11/22/1988 |
| 4786524 | Coating formulation and method for refinishing the surface of surface-damaged graphite articles The described development is directed to a coating formulation for filling surface irregularities in graphite articles such as molds, crucibles, and matched die sets used in high-temperature metallurgical operations. The coating formulation of the present... | 11/22/1988 |
| 4769045 | Method for the desulfurization of hot product gases from coal gasifier The gasification of sulfur-bearing coal produces a synthesis gas which contains a considerable concentration of sulfur compounds especially hydrogen sulfide that renders the synthesis gas environmentally unacceptable unless the concentration of the sulfur... | 09/06/1988 |
| 4767929 | Extended range radiation dose-rate monitor An extended range dose-rate monitor is provided which utilizes the pulse pileup phenomenon that occurs in conventional counting systems to alter the dynamic response of the system to extend the dose-rate counting range. The current pulses from a solid-sta... | 08/30/1988 |
| 4764598 | Precursors to radiopharmaceutical agents for tissue imaging A class of radiolabeled compounds to be used in tissue imaging that exhibits rapid brain uptake, good brain:blood radioactivity ratios, and long retention times. The imaging agents are more specifically radioiodinated aromatic amines attached to dihydropy... | 08/16/1988 |
| 4764358 | Radiolabeled dimethyl branched long chain fatty acid for heart imaging A radiolabeled long chain fatty acid for heart imaging that has dimethyl branching at one of the carbons of the chain which inhibits the extent to which oxidation can occur. The closer to the carboxyl the branching is positioned, the more limited the oxid... | 08/16/1988 |
| 4763521 | Method and apparatus for determining weldability of thin sheet metal A fixture is provided for testing thin sheet metal specimens to evaluate hot-cracking sensitivity for determining metal weldability on a heat-to-heat basis or through varying welding parameters. A test specimen is stressed in a first direction with a load... | 08/16/1988 |
| 4762656 | Method for hot pressing beryllium oxide articles The hot pressing of beryllium oxide powder into high density compacts with little or no density gradients is achieved by employing a homogeneous blend of beryllium oxide powder with a lithium oxide sintering agent. The lithium oxide sintering agent is uni... | 08/09/1988 |
| 4758539 | Process for producing ceramic nitrides and carbonitrides and their precursors A process for preparing ceramic nitrides and carbonitrides in the form of very pure, fine particulate powder. Appropriate precursor is prepared by reacting a transition metal alkylamide with ammonia to produce a mixture of metal amide and metal imide in t... | 07/19/1988 |
| 4755345 | Impedance matched, high-power, rf antenna for ion cyclotron resonance heating of a plasma A resonant double loop radio frequency (rf) antenna for radiating high-power rf energy into a magnetically confined plasma. An inductive element in the form of a large current strap, forming the radiating element, is connected between two variable capacit... | 07/05/1988 |
| 4751390 | Radiation dose-rate meter using an energy-sensitive counter A radiation dose-rate meter is provided which uses an energy-sensitive detector and combines charge quantization and pulse-rate measurement to monitor radiation dose rates. The charge from each detected photon is quantized by level-sensitive comparators s... | 06/14/1988 |
| 4751428 | Ternary gas mixture for diffuse discharge switch A new diffuse discharge gas switch wherein a mixture of gases is used to take advantage of desirable properties of the respective gases. There is a conducting gas, an insulating gas, and a third gas that has low ionization energy resulting in a net increa... | 06/14/1988 |
| 4747938 | Low temperature pyrolysis of coal or oil shale in the presence of calcium compounds A coal pyrolysis technique or process is described in which particulate coal is pyrolyzed in the presence of about 5 to 21 wt. % of a calcium compound selected from calcium oxide, calcined (hydrate) dolomite, or calcined calcium hydrate to produce a high ... | 05/31/1988 |
| 4746501 | Process for preparing transition metal nitrides and transition metal carbonitrides and their reaction intermediates A process for making ammonolytic precursors to nitride and carbonitride ceramics. Extreme reaction conditions are not required and the precursor is a powder-like substance that produces ceramics of improved purity and morphology upon pyrolysis.... | 05/24/1988 |
| 4743807 | Laser activated diffuse discharge switch The invention is a gas mixture for a diffuse discharge switch which is capable of changing from a conducting state to an insulating state in the presence of electrons upon the introduction of laser light. The mixture is composed of a buffer gas such as ni... | 05/10/1988 |
| 4742009 | Method for monitoring stack gases for uranium activity A method for monitoring the stack gases of a purge cascade of a gaseous diffusion plant for uranium activity. A sample stream is taken from the stack gases and contacted with a volume of moisture-laden air for converting trace levels of uranium hexafluori... | 05/03/1988 |
| 4735765 | Flexible helical-axis stellarator An 1=1 helical winding which spirals about a conventional planar, circular central conductor of a helical-axis stellarator adds a significant degree of flexibility by making it possible to control the rotational transform profile and shear of the magnetic... | 04/05/1988 |
| 4735706 | Process and apparatus for coal hydrogenation In a coal liquefaction process an aqueous slurry of coal is prepared containing a dissolved liquefaction catalyst. A small quantity of oil is added to the slurry and then coal-oil agglomerates are prepared by agitation of the slurry at atmospheric pressur... | 04/05/1988 |
| 4735792 | Radioiodinated maleimides and use as agents for radiolabeling antibodies A radiopharmaceutical for antibody labeling comprising an iodophenyl maleimide that attaches thiol sites of proteins thereby maintaining bioreactivity largely located at the nitrogen sites.... | 04/05/1988 |
| 4735866 | Copper-silver-titanium-tin filler metal for direct brazing of structural ceramics A method of joining ceramics and metals to themselves and to one another at about 800° C. is described using a brazing filler metal consisting essentially of 35 to 50 at. % copper, 40 to 50 at. % silver, 1 to 15 at. % titanium, and 2 to 8 at. % tin. This... | 04/05/1988 |
