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 |
| 4864652 | Method and apparatus for reducing radiation exposure through the use of infrared data transmission A method and apparatus is described for transmitting information, for exae, dosimetry data from a hazardous environment such as a radioactive area to a remote relatively safe location. A radiation detector senses the radiation and generates an electrical... | 09/05/1989 |
| 4858476 | Breathing zone air sampler A sampling apparatus is provided which comprises a sampler for sampling air in the breathing zone of a wearer of the apparatus and a support for the sampler preferably in the form of a pair of eyeglasses. The sampler comprises a sampling assembly supporte... | 08/22/1989 |
| 4858817 | Graphit-ceramic RF Faraday-thermal shield and plasma limiter The present invention is directed to a process of brazing a ceramic mater to graphite. In particular, the brazing procedure is directed to the production of a novel brazed ceramic graphite product useful as a Faraday shield.... | 08/22/1989 |
| 4837936 | Underwater measuring gage A device for remotely measuring the diameter of wire rope. The device includes a linear variable differential tansducer, a mechanism to guide and clamp the rope in relation to the anvil of the transducer, an elongated handle for manually manipulating the ... | 06/13/1989 |
| 4838098 | Contained radiological analytical chemistry module A system which provides analytical determination of a plurality of water chemistry parameters with respect to water samples subject to radiological contamination. The system includes a water sample analyzer disposed within a containment and comprising a s... | 06/13/1989 |
| 4828691 | Submersible purification system for radioactive water A portable, submersible water purification system for use in a pool of water containing radioactive contamination includes a prefilter for filtering particulates from the water. A resin bed is then provided for removal of remaining dissolved, particulate,... | 05/09/1989 |
| 4827773 | Measuring alignment of loading fixture An apparatus and method for measuring the alignment of a clevis and pin type loading fixture for compact tension specimens include a pair of substantially identical flat loading ligaments. Each loading ligament has two apertures for the reception of a res... | 05/09/1989 |
| 4814058 | Measuring electrode assembly A pH measuring electrode assembly for immersion in a solution includes an enclosed cylindrical member having an aperture at a lower end thereof. An electrolyte is located in the cylindrical member above the level of the aperture and an electrode is dispos... | 03/21/1989 |
| 4812575 | Process for the preparation of benozotriazoles and their polymers, and 2(2-hydroxy-5-isopropenylphenyl)2H-benzotriazole produced thereby The compound 2(2-hydroxy-5-isopropenylphenyl)2H-benzotriazole (2H5P) is produced by azo coupling of o-nitrophenyl diazonium chloride with p-hydroxyacetophenone, subjecting the resulting isolated azo compound to reductive cyclization with zinc in the prese... | 03/14/1989 |
| 4806216 | Electrochemical polishing of notches An apparatus and method are disclosed for the selective electrochemical polishing of a lateral tip of a deep longitudinal notch in a work piece used to test crack initiation properties of materials. A DC power source is connected to the work piece and to ... | 02/21/1989 |
| 4792276 | Turbomachinery debris remover An apparatus for removing debris from a turbomachine. The apparatus includes housing and remotely operable viewing and grappling mechanisms for the purpose of locating and removing debris lodged between adjacent blades in a turbomachine.... | 12/20/1988 |
| 4782696 | Measuring axial pump thrust An apparatus for measuring the hydraulic axial thrust of a pump under operation conditions is disclosed. The axial thrust is determined by forcing the rotating impeller off of an associated thrust bearing by use of an elongate rod extending coaxially with... | 11/08/1988 |
| 4762003 | Material test machine for tension-compression tests at high temperature Apparatus providing a device for testing the properties of material specimens at high temperatures and pressures in controlled water chemistries includes, inter alia, an autoclave housing the specimen which is being tested. The specimen is connected to a ... | 08/09/1988 |
| 4745194 | Ultraviolet light absorbers having two different chromophors in the same molecule Ultraviolet light absorbing compounds having two different chromophors in the same molecule, particularly the benzotriazole chromophor and either the dihydroxybenzophenone or dihydroxyacetophenone chromophor; specifically, the two compounds 3,5-[di(2... | 05/17/1988 |
| 4744692 | Split-tapered joint clamping device This invention relates to a clamping device for removably attaching a tool element to a bracket element wherein a bracket element is disposed in a groove in the tool and a clamping member is disposed in said groove and in engagement with a clamping face o... | 05/17/1988 |
| 4737204 | Heat treatment giving a stable high temperature micro-structure in cast austenitic stainless steel A novel micro-structure developed in a cast austenitic stainless steel alloy and a heat treatment thereof are disclosed. The alloy is based on a multicomponent Fe-Cr-Mn-Mo-Si-Nb-C system consisting of an austenitic iron solid solution (γ) matrix reinforc... | 04/12/1988 |
| 4732597 | Low energy consumption method for separating gaseous mixtures and in particular for medium purity oxygen production A method for the separation of gaseous mixtures such as air and for producing medium purity oxygen, comprising compressing the gaseous mixture in a first compressor to about 3.9-4.1 atmospheres pressure, passing said compressed gaseous mixture in heat exc... | 03/22/1988 |
| 4732730 | Stuck fuel rod capping sleeve A stuck fuel rod capping sleeve to be used during derodding of spent fuel assemblies if a fuel rod becomes stuck in a partially withdrawn position and, thus, has to be severed. The capping sleeve has an inner sleeve made of a lower work hardening highly d... | 03/22/1988 |
| 4725080 | Remotely operated pipe connector An apparatus for remotely assembling and disassembling a Graylock type coctor between a pipe and a closure for the pipe includes a base and a receptacle on the base for the closure. The pipe is moved into position vertically above the closure by a suitab... | 02/16/1988 |
| 4720969 | Regenerator cross arm seal assembly A seal assembly for disposition between a cross arm on a gas turbine engine block and a regenerator disc, the seal assembly including a platform coextensive with the cross arm, a seal and wear layer sealingly and slidingly engaging the regenerator disc, a... | 01/26/1988 |
| 4714585 | Interlocking egg-crate type grid assembly Disclosed is an interlocking egg-crate hexagonal grid for supporting a nuclear fuel pin in a hexagonal array. The grid is formed from strips bent at an angle of about 120° at each vertex. Over some faces of each hexagonal cell the strips are coplanar but... | 12/22/1987 |
| 4705369 | Mirror mount A mirror mount (10) is provided that allows free pitch, yaw and roll motion of the mirror (28) while keeping the location of a point (56) on the surface of the mirror (28) fixed in the rest frame of reference of the mount (10). Yaw movement is provided by... | 11/10/1987 |
| 4698963 | Low NOx combustor A combustor having an annular first stage, a generally cylindrically-shaped second stage, and an annular conduit communicably connecting the first and second stages. The conduit has a relatively small annular height and a large number of quench holes in t... | 10/13/1987 |
| 4695299 | Method and apparatus for in-cell vacuuming of radiologically contaminated materials A vacuum air flow operated cyclone separator arrangement for collecting, handling and packaging loose contaminated material in accordance with acceptable radiological and criticality control requirements. The vacuum air flow system includes a specially de... | 09/22/1987 |
| 4693947 | System for agitating the acid in a lead-acid battery A system and method for agitating the acid in a large lead-sulfuric acid storage battery of the calcium type. An air-lift is utilized to provide the agitation. The air fed to the air-lift is humidified prior to being delivered to the air-lift.... | 09/15/1987 |
| 4687990 | Brush potential curve tracer A device for analyzing commutating characteristics of a motor or generator includes a holder for supporting a plurality of probes adjacent a brush of the motor or generator. Measurements of electrical current characteristics in each of the probes provides... | 08/18/1987 |
| 4680585 | Pulse-excited, auto-zeroing multiple channel data transmission system A multiple channel data transmission system is provided in which signals from a plurality of pulse operated transducers and a corresponding plurality of pulse operated signal processor channels are multiplexed for single channel FM transmission to a recei... | 07/14/1987 |
| 4664944 | Deposition method for producing silicon carbide high-temperature semiconductors An improved deposition method for producing silicon carbide high-temperature semiconductor material comprising placing a semiconductor substrate composed of silicon carbide in a fluidized bed silicon carbide deposition reactor, fluidizing the bed particle... | 05/12/1987 |
| 4647317 | Manufacturing process to reduce large grain growth in zirconium alloys A method of treating cold-worked zirconium alloys to reduce large grain gth during thermal treatment at temperatures above the recrystallization temperature of the alloy comprising heating the cold-worked alloy between about 1300°-1350° F. for 1 to 3 h... | 03/03/1987 |
| 4643868 | Support arrangement for core modules of nuclear reactors A support arrangement is provided for the core modules of a nuclear reactor which provides support access through the control drive mechanisms of the reactor. This arrangement provides axial support of individual reactor core modules from the pressure ves... | 02/17/1987 |
| 4642578 | Push-pull radio frequency circuit with integral transistion to waveguide output A radio frequency circuit for ICRF heating includes a resonant push-pull circuit, a double ridged rectangular waveguide, and a coupling transition which joins the waveguide to the resonant circuit. The resonant circuit includes two cylindrical conductors ... | 02/10/1987 |
| 4639401 | Surfactant addition to phosphoric acid electrolyte A phosphoric acid fuel cell having an improved electrolyte comprising concentrated H3 PO4 and at least 0.5 wt. percent lauryl dimethyl amine.... | 01/27/1987 |
| 4637717 | Dual beam translator for use in Laser Doppler anemometry A method and apparatus for selectively translating the path of at least one pair of light beams in a Laser Doppler anemometry device whereby the light paths are translated in a direction parallel to the original beam paths so as to enable attainment of sp... | 01/20/1987 |
| 4603463 | In situ repair of a failed compression fitting A method and apparatus for the in situ repair of a failed compression fitg is provided. Initially, a portion of a guide tube is inserted coaxially in the bore of the compression fitting and locked therein. A close fit dethreading device is then coaxially... | 08/05/1986 |
| 4599703 | Low frequency AC waveform generator Low frequency sine, cosine, triangle and square waves are synthesized in circuitry which allows variation in the waveform amplitude and frequency while exhibiting good stability and without requiring significant stabilization time. A triangle waveform is ... | 07/08/1986 |
| 4597934 | Multi-function magnetic jack control drive mechanism A multi-function magnetic jack control drive mechanism for controlling a nuclear reactor is provided. The mechanism includes an elongate pressure housing in which a plurality of closely spaced drive rods are located. Each drive rod is connected to a rod w... | 07/01/1986 |
| 4515007 | Method of and apparatus for testing the integrity of filters A method of and apparatus for testing the integrity of individual filters or filter stages of a multistage filtering system including a diffuser permanently mounted upstream and/or downstream of the filter stage to be tested for generating pressure differ... | 05/07/1985 |
| 4508886 | Method for making adhesive from biomass A method is described for making adhesive from biomass. A liquefaction oil is prepared from lignin-bearing plant material and a phenolic fraction is extracted therefrom. The phenolic fraction is reacted with formaldehyde to yield a phenol-formaldehyde res... | 04/02/1985 |
| 4501146 | Detection of free liquid in containers of solidified radioactive waste A method of nondestructively detecting the presence of free liquid within a sealed enclosure containing solidified waste by measuring the levels of waste at two diametrically opposite locations while slowly tilting the enclosure toward one of said locatio... | 02/26/1985 |
| 4498834 | Valve for fuel pin loading system A cyclone valve surrounds a wall opening through which cladding is projected. An axial valve inlet surrounds the cladding. Air is drawn through the inlet by a cyclone stream within the valve. An inflatable seal is included to physically engage a fuel pin ... | 02/12/1985 |
