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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 4866457 | Covered inverted offset cassegrainian system An inverted offset system is used for sending and/or receiving electromagnetic energy. The system, which is preferably a Cassegrainian microwave antenna system, includes a water-tight cover to protect the feed compartment, subreflector, and main reflector... | 09/12/1989 |
| 4860803 | Continuous nitrox mixer The continuous NITROX mixer is a pre-calibrated, continuous flow, gas mix system and a method which combines pure oxygen and air at atmospheric pressure, to create a final mixture of predetermined composition. Constituent gases are regulated to the same ... | 08/29/1989 |
| 4685661 | Method and mechanism for fixturing objects A programmably controllable vise has mechanisms for automatic adjustment of orkpiece position relative to three orthogonal axes. The positions of the vise jaws (during clamping) establish workpiece position along a first axis, and stop members (e.g., pisto... | 08/11/1987 |
| 4675132 | Polyunsaturated fatty acids from fish oils Polyunsaturated fatty acid moieties in fish oil are concentrated by transesterifying fish oil glycerides with a lower alkanol to form a mixture of lower alkyl fatty acid esters, and extracting the esters with carbon dioxide under supercritical conditions.... | 06/23/1987 |
| 4672851 | Acoustic evaluation of thermal insulation An acoustic method for measuring the quantity and installed density of thal insulation includes introducing a sensing apparatus comprised of one or two acoustic transducers which are so placed as to measure the attenuation and/or phase shift of acoustic ... | 06/16/1987 |
| 4647933 | Phased antenna array for wind profiling applications A diagonal phased antenna array for use as a wind profiler by means of Doer shift measurements comprises a plurality of Yagi-Uda antennas which are oriented in a predetermined direction such that Yagi-Uda antennas have a polarization 45° offset from the... | 03/03/1987 |
| 4638257 | Amplification by a phase locked array of Josephson junctions A Josephson junction amplifier comprising an array of series connected Josephson junctions which are maintained in a finite voltage, mutually electromagnetically phase-locked state. An input signal is applied across a first group of one or more but less t... | 01/20/1987 |
| 4633256 | Method and apparatus for four-beam radar A method and apparatus for producing remote profiling beams pointing altetely to the north, east, west or south by ordered distribution of phase shifts to elements of a square antenna array. Elements within a given group of four array elements share a re... | 12/30/1986 |
| 4618410 | Shale oil dearsenation process An improved process for shale oil dearsenation comprises coking a retorted hale oil stream following by contacting the liquid coker product with water. Water washing is preferably carried out under ambient conditions to achieve a reduction to less than 3 p... | 10/21/1986 |
| 4606906 | Process of synthesizing mixed BaO-TiO2 based powders for ceramic applications A process for producing any desired Ba/Ti mixture to be formulated as an amorphous solid which crystallizes at very low temperatures to yield a desired phase or phases is disclosed. The process yields products free of undesirable impurities and allows mac... | 08/19/1986 |
| 4606902 | Process for preparing refractory borides and carbides Refractory borides or carbides are prepared by contacting an alkali-metal ducible metal chloride or silicon tetrachloride with boron trichloride or carbon tetrachloride in an inert solvent in the presence of an alkali metal, the metal chloride or silicon ... | 08/19/1986 |
| 4601055 | Image processor An iconic-to-iconic low-level image processor is provided which comprises a lurality of identical sequential intermediate stages located between an input stage adapted to be connected to image sources such as analog or digital television cameras, ranging d... | 07/15/1986 |
| 4590597 | Modulation transfer spectroscopy for stabilizing lasers A method and apparatus are disclosed for precisely stabilizing a laser to a sub-Doppler resonance of an absorbing gas contained in a cell located external to the laser resonator. Stabilization is based on the detection of modulation transferred onto a pre... | 05/20/1986 |
| 4576486 | Optical fiber thermometer A temperature measuring device suitable for high temperature measurements in the range of 500°-2400° C. utilizing a blackbody cavity to emit radiation in the wavelength band of 0.3 μm-1.0 μm. The emitted light is transmitted to a photodetector via a h... | 03/18/1986 |
| 4559717 | Flexure hinge An improved flexure hinge permits both angular pivoting and longitudinal expansion and contraction and is made of a body member of solid material which is normally not flexible or expandable. A first recess is defined part-way through the body member at o... | 12/24/1985 |
| 4558218 | Heat pipe oven molecular beam source A heat pipe oven molecular beam source wherein a hollow porous metal, metalloid or ceramic body with at least one opening is nearly saturated with the working material and heated to just above the melting point of the working material, generating a thin l... | 12/10/1985 |
| 4525067 | Twin-etalon scanning spectrometer A twin-etalon scanning spectrometer is disclosed that provides high luminosity and high resolution. The etalons are positioned in spaced relationship with respect to one another in series in the path of an emission light source. With identical etalons so ... | 06/25/1985 |
| 4520320 | Synchronous phase marker and amplitude detector Disclosed is an electronic circuit for determining the phase difference between an input signal and a reference signal where both signals are of the same frequency. Furthermore, the circuit provides an amplitude output indicative of the input signal even ... | 05/28/1985 |
| 4504498 | Acoustic thawing of frozen food The thawing time of frozen block food is shortened by subjecting the frozen food to low power sound energy having a frequency in the relaxation frequency spectrum of the ice crystals in the frozen food and having a sound pressure level in the range of abo... | 03/12/1985 |
| 4499770 | Systems for monitoring changes in elastic stiffness in composite materials Traversing energy flux transmitted into a fiber/matrix composite structure is propagated through the structure in directions which vary depending upon the elastic stiffness condition of the composite. Degradation in elastic stiffness of the composite, fro... | 02/19/1985 |
| 4481517 | Echometry device and method Devices and methods are disclosed for remote measurment of temperature (and velocity) profiles in a fluid medium (i.e., the atmosphere and/or oceans). Each device, herein called an echometer, and method are capable of providing remote measurements of temp... | 11/06/1984 |
| 4471444 | Rotating tool wear monitoring apparatus A system is provided for predicting when the failure of a rotating machine ool or part is imminent or when a tool is worn. The system includes a transducer for producing an output related to the workpiece vibrations caused by the machine tool and an analog... | 09/11/1984 |
| 4464401 | Acoustic thawing of frozen food The thawing time of frozen block fish is shortened by immersing the frozen block fish in a water bath at a maximum temperature of about 10° C. and subjecting the frozen fish to a maximum of about 6 watts of acoustic power having a frequency equal to the ... | 08/07/1984 |
| 4461680 | Process and bath for electroplating nickel-chromium alloys A process for the electrodeposition of a nickel chromium alloy on a catho substrate comprises: contacting the substrate with an aqueous electrolyte containing: about 50-125 g/l of CrCl3.6H.sub.2 O; about 10-125 g/l of NiCl2.6H.sub.2... | 07/24/1984 |
| 4449823 | Device for measurement of the spectral width of nearly monochromatic sources of radiant energy A method and apparatus for measuring the spectral width of a nearly monochromatic source of radiant energy, when the general shape of the spectral line is known. Portions of the signal beam from the source of energy are introduced into two parallel interf... | 05/22/1984 |
| 4445389 | Long wavelength acoustic flowmeter A nonintrusive instrument for measuring the volume flowrate of, and the speed of sound in, an arbitrary fluid in a pipe, tube or duct. The sound speed measured is that of a stationary fluid even though the measurement is made while the fluid may be flowin... | 05/01/1984 |
| 4444501 | Stabilization mechanism for optical interferometer A stabilizer for the relative mirror separation and inclination in a Michelson (two beam) or a Fabry-Perot (multiple beam) interferometer that generates at least three reference beams and in one embodiment an optional monitor beam. The reference beams are... | 04/24/1984 |
| 4437080 | Method and apparatus utilizing crystalline compound superconducting elements having extended strain operating range capabilities without critical current degradation Method and apparatus are disclosed utilizing superconducting elements with extended strain operating range capabilities. The superconducting element is formed from a crystalline compound superconductive material that does not exhibit appreciable critical ... | 03/13/1984 |
| 4433336 | Three-element antenna formed of orthogonal loops mounted on a monopole A three-element directional/omnidirectional antenna adapted for use in both transmitting and receiving modes. Crossed loop antennas are mounted on top of a monopole whip antenna and are electrically coupled thereto. Each of the loop antennas consists of a... | 02/21/1984 |
| 4398293 | Frequency stabilization for two-mode laser Frequency stabilization is disclosed for a two-mode laser, such as a Zeeman aser. The emission frequency of the laser is servo-stabilized to the center of the atomic gain curve to provide a stable laser reference frequency that is independant of time and e... | 08/09/1983 |
| 4393699 | Pneumatic adhesion tester This tester comprises a fixture which is bonded to a coating or surface, a plate and a membrane which are sealed together along their peripheries. A hole extends through the membrane and at least into the plate for receiving the fixture so that its bond... | 07/19/1983 |
| 4374171 | Smolder and flame resistant insulation materials, composition and method A flame and smolder resistant cellulosic insulation material, method of tting loose-fill cellulosic material, and composition for imparting flame and smolder resistance to such materials are disclosed with the combination of from about 2 to 9% sulfur and... | 02/15/1983 |
| 4361630 | Ultra-black coating due to surface morphology The invention provides a method of producing an ultra-black surface coating, having an extremely high light absorption capacity, on a substrate, such as a metal, ceramic, glass, or plastic, the blackness being associated with a unique surface morphology c... | 11/30/1982 |
| 4351810 | Method for removing sulfur dioxide from a gas stream A method is provided for removing SO2 from gas streams by its gas-phase reaction with a stabilized Criegee intermediate under conditions where a very large excess of water vapor is avoided, resulting in efficient scavenging of SO2 by... | 09/28/1982 |
| 4338608 | Triple-beam offset paraboloidal antenna A triple-beam offset paraboloidal antenna minimizes the offset of each of ree antenna feeds from the focal point of the paraboloid to thereby minimize beam aberrations, while at the same time maximizing the beam steering capability of the antenna. Three b... | 07/06/1982 |
| 4327233 | Method for producing carbocyclic compounds from cyclic sulfide A method is provided for producing a carbocyclic compound by contacting an rganic compound containing a 4-8 membered cyclic sulfide with ozone, in the vapor phase, and recovering a product containing a 3-7 membered carbocyclic ring.... | 04/27/1982 |
| 4314466 | Handcuff improvements Triple locking handcuffs are provided having a lock which has an abutment erein which pushes against a bolt in the lock to double lock the latch and triple lock the ratchet and pawl of the lock. In the triple locked position a biasing means forces the bol... | 02/09/1982 |
| 4302345 | Flame retarding cellulosic materials with sodium or potassium thiocyanate A flame resistant cellulosic insulation material, method of treating loosll cellulosic material and compositions for imparting flame resistance and flame and smolder resistance to such materials are disclosed utilizing thiocyanate compounds interstitiall... | 11/24/1981 |
| 4266130 | Method and apparatus for detecting clear air turbulences An improved clear air turbulence (CAT) detector sensing infrared radiation in the 27-33 micrometer range of the water vapor rotational wavelength band. The improved clear air turbulence detector for use on an aircraft includes a forward looking and upward... | 05/05/1981 |
| 4260660 | Use of sulphur as an additive to inhibit the smoldering combustion of materials Disclosed is a smolder resistant upholstered furniture or mattress assembly nd a method for rendering the composite materials of such assembly smolder resistant. Placement of a layer of sulphur immediately adjacent a normally smolder-prone material in the ... | 04/07/1981 |
