Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4326808 | Method and apparatus for determining physical characteristics of object outer surfaces A method and apparatus is disclosed for determining physical characteristics, such as defects, in the outer surface of an elongate object, wherein the object to be inspected passes through an aperture of a mirror surface which is a conical surface of revo... | 04/27/1982 |
| 4304309 | Surface drilling apparatus A surface drilling apparatus for drilling large diameter holes in soft to medium-hard earth formations includes a cylindrical casing defined by a stationary upper section and a lower section rotatable relative to the upper section; a plurality of circular... | 12/08/1981 |
| 4297246 | Method of producing dense refractory oxide coatings on metallic substrates and the production of catalysts from the coated substrates The invention is concerned with providing substrates with coatings obtainable from sols, for example to protect the substrate (such as in nuclear reactors or hydrocarbon cracking plant) or to provide a carrier for catalytically active material. Hitherto, ... | 10/27/1981 |
| 4288756 | CO2 Laser A transverse flow gas discharge laser in which the cathode has an elongated cross-section the larger dimension of which is positioned at an angle to the direction of flow of the gaseous lasing medium. The anode of the laser is of modular construction and ... | 09/08/1981 |
| 4285526 | Sealing device for bearings, especially roll bearings A sealing device for bearings in which two sealing areas are provided in series, each comprising an elastomeric sealing lip, the lips being part of a single ring and contacting cylindrical surfaces of a surrounding housing, the sealing ring being attached... | 08/25/1981 |
| 4286158 | Neutral radiation detection and localization PCT No. PCT/FR 78/00046 Sec. 371 Date Aug. 2, 1979 Sec. 102(e) Date Aug. 2, 1979 PCT Filed Dec. 7, 1978 PCT Pub. No. W079/00353 PCT Pub. Date June 28, 1979 A device for detecting and localizing soft gamma and X radiations, comprising an enclosure 10 provi... | 08/25/1981 |
| 4284593 | Preparation of shaped bodies There is disclosed a method for the preparation of a shaped body which includes pressing a powder to give a "green" shaped body wherein the powder has been made by comminuting a material prepared by means of a gelation process, the material prior to commi... | 08/18/1981 |
| 4284947 | Detecting the size and shape of bodies The size and shape of a body is determined by rolling it between the plates of capacitors, the dielectric constant of which is thereby changed. A capacitor scans sections of the body along its longitudinal axis to detect its diameter and surface faults, a... | 08/18/1981 |
| 4278882 | Coal ash monitors A monitor for determining the ash content of coal in wagons consisting of a structure including means for irradiating each wagon as it passes the structure with a known dose of neutrons, means for detecting and measuring the intensities of γ-rays emitted... | 07/14/1981 |
| 4278531 | Apparatus and method for transporting items A method and an apparatus for transporting items such as chopped nuclear fuel pins from a receiving station to a discharge station. The apparatus contains a liquid for transporting the items in an inlet duct which extends downwardly from the receiving sta... | 07/14/1981 |
| 4277690 | Plant for utilizing kinetic energy A plant for utilizing kinetic energy inherent in the wave movement of water or heaving of the sea. The plant comprises a float unit and energy absorption apparatus connected to the unit. The absorption apparatus comprises an immersed piston built into an ... | 07/07/1981 |
| 4275294 | Security system and strip or strand incorporating fibre-optic wave-guide means therefor To provide security against unauthorised crossing of a boundary, at least one fibre-optic wave-guide extends along the boundary. Light is directed into one end of the guide and the light leaving the guide is detected by an optical detector. An indication ... | 06/23/1981 |
| 4274937 | Apparatus for sensing electrical potentials A sensor and method are disclosed for measuring electrokinetic effects across a double layer formed at the boundary between a solid wall and an ionic liquid flowing through a channel. In one embodiment, a passive electrode is located in a cavity forming a... | 06/23/1981 |
| 4275039 | Separation of tungsten and molybdenum by solvent extraction The invention relates to the production of tungsten having a low impurity content of molybdenum from impure minerals such as scheelite. An aqueous acidic feed solution containing both molybdenum and tungsten, and also containing enough hydrogen peroxide to dep... | 06/23/1981 |
| 4272867 | Apparatus for loading a rope-like strand of fibers into spinning cans The apparatus is usable with a funnel wheel and a tube which undergoes tumbling movements for receiving a rope-like strand of fibers from a card or drawing frame and piling the strand of fibers in cycloidal loops in a ramp, through which the rope-like str... | 06/16/1981 |
| 4272945 | Process and apparatus for the production of a guarantee closure Containers such as drink bottles are provided with closure caps having plastics guarantee strips shrink fitted on to the containers which can be torn off when the container is first opened. The present invention provides a process for the production of su... | 06/16/1981 |
| 4273980 | Spring-loaded catch mechanism for push-buttons of electrical apparatus An electrical apparatus such as a switch comprises a housing and a push-button. A spring-loaded catch mechanism holds the push-button alternately in a rest position and in a working position for which the push-button protrudes more or less from the housin... | 06/16/1981 |
| 4272474 | Process for producing articles of ultra high molecular weight high density polyethylene A process for producing articles of ultra high molecular weight high density polyethylene is disclosed which avoids long heating and cooling cycles, and compacting pressures in the order of 3,000 to 4,000 lbs/sq. inch. The resin is intensively mixed and t... | 06/09/1981 |
| 4271733 | Rotary tools A rotary tool for working in a cramped and possibly hostile environment. The tool can be clamped into position and left to work automatically. The tool has a resiliently biased pin and a ratchet driven cam for ensuring that the working unit cannot become ... | 06/09/1981 |
| 4271748 | Shorting and radiation protection device for rocket The invention disclosed is a safety device for preventing premature firing of a rocket due to radiation directed at the aft-end of the rocket. The safety device which is attached to the aft-end of a rocket comprises an electrical contact ring which is ele... | 06/09/1981 |
| 4268924 | Syphon-operated closet bowl flush tank A syphon-operated closet bowl flush tank of the kind comprising an inverted bell (10) containing a liftable plunger disc (12) to initiate syphon action has a flush control valve (14) comprising a tubular body part (16) mounted vertically in the top (18) o... | 05/26/1981 |
| 4268989 | Buoyant device with means for producing thrust A floatable toy has a body which even when filled with water is inherently buoyant, has an aperture for readily filling with water and when floating in the level of the water within is higher than the level of surface upon which the body floats and having... | 05/26/1981 |
| 4269235 | Method and apparatus for winding a plurality of windings that are to be collected in a stator sheet packet Method and apparatus for sequentially winding a plurality of windings on a winding form and for transferring the windings sequentially from the winding form to a collecting tool such that the plurality of windings are disposed on a collecting tool for sub... | 05/26/1981 |
| 4269318 | Sheet metal shelf An improved sheet metal shelf is disclosed which may be made without welding, thus allowing prepainted or finished metal sheet to be used. The shelf is a one piece metal shelf having a top panel, side walls and end walls extending down from the sides and ... | 05/26/1981 |
| 4269725 | Washing compositions The present invention provides washing compositions in which all or part of the detergent builder salt is provided by a mixture of zeolites 13X and 4A. Preferably the weight ratio of 13X to 4A is in the range of 50:50 to 85:15 and especially from 65:35 to... | 05/26/1981 |
| 4269874 | Method and apparatus for marking parts A spray of ink, paint, or other marking liquid is formed and sprayed through a stencil member for marking a part with a stencil character. Various means are provided to periodically move the stencil member for removal of marking fluid to keep the system c... | 05/26/1981 |
| 4269189 | Skin conducting electrode assembly A disposable skin conducting electrode assembly and electrode is disclosed for use on a patient wherein the electrode assembly comprises a gel pad, an electrode and an adhesive pad. The electrode is a thin conductive plate containing an interior area or a... | 05/26/1981 |
| 4268156 | Washing apparatus for photographic materials A washing apparatus for washing photographic materials is disclosed. The apparatus has an aerator which can be adjusted to supply air and water at varying flow and water pressures and overcomes other problems in print and negative washers of this type. Th... | 05/19/1981 |
| 4268664 | Process for the preparation of 1-N-isoseryl- or 1-N-(L-4-amino-2-hydroxybutyryl)-3',4'-dideoxykanamycin B and intermediates thereof 1-N-Isoseryl- or 1-N-(L-4-amino-2-hydroxybutyryl)-3',4'-dideoxykanamycin B is prepared through a new route starting from 3',4'-dideoxy-3',4'-didehydrokanamycin B, which comprises the steps of protecting all or some of the four amino groups other than the ... | 05/19/1981 |
| 4268381 | Rotary pulp screening device of the vertical pressure type A rotary pulp screening device is disclosed which is less sensitive to variation in pulp flow, pulp consistency and pressure than existing pulp screens. The device is of the vertical pressure type and includes a cylindrical housing having an upper inlet c... | 05/19/1981 |
| 4267982 | Bark shredder A bark shredder is disclosed for shredding bark and other waste wood products into small pieces. The shredder rotates in either direction unlike existing bark shredders which allows twice the normal operating time between servicing. The shredder has a cas... | 05/19/1981 |
| 4267099 | Process for preparing aqueous dispersion of rosin-base materials This invention provides a process for preparing an aqueous dispersion of a rosin-base material by a so-called inversion method, the process being characterized in that the dispersant is at least one member selected from the group consisting of: (a) salt o... | 05/12/1981 |
| 4266955 | Particle-in-gas filtration A filter assembly for particle-in-gas filtration comprises ducts leading to a filter housing which is removable from the ducts and is provided with covers to prevent egress of material from the housing during transport. Covers may be also provided for the... | 05/12/1981 |
| 4266928 | Filling device for introducing pre-foamed post-expandable thermoplastics into molds for the production of moldings The present invention relates to a filling device for introducing pre-foamed, post-expandable thermoplastics into molds for the production of moldings from plastic foams, especially from pre-foamed polystyrene foam, for example Styropor or Styrocell, in w... | 05/12/1981 |
| 4266794 | Two-wheeled vehicle A two-wheeled vehicle similar to a bicycle has a frame comprising four pivotably interconnected frame members of which the lower one is provided with a bearing for a sprocket wheel of a chain drive. A crank arm is connected to the sprocket wheel and coope... | 05/12/1981 |
| 4266545 | Portable suction device for collecting fluids from a closed wound A portable closed wound suction device is provided which is adapted to be worn on the body following outpatient and other limited surgical procedures. Specifically, the device provides a rigid container which is adapted to be strapped to the body of a pat... | 05/12/1981 |
| 4267092 | Filler composition comprising a filler and an aqueous binder resin emulsion comprising a quick drying polymer emulsion and a flexible polymer emulsion A filler composition consists of 60 to 85% by weight of silica, dolomite and/or calcite of size below 150 μm and of average size above 20 μm, and 40 to 15% by weight of an aqueous emulsion of 40 to 70% solids of a resin binder mixture comprising a quick... | 05/12/1981 |
| 4265462 | Support device for skiers Support devices for the shanks of skier's legs wherein levers on opposite sides of and parallel to the shank are pivoted about an axis at ankle height and secured to the shank just beneath the knee by a flexible strap. Two rods are pivoted to the lever ar... | 05/05/1981 |
| 4265253 | Skin conducting electrode and electrode assembly A disposable skin conducting electrode assembly and electrode is disclosed for use on a patient wherein the electrode assembly comprises a gel pad, an electrode and an adhesive pad. The electrode is a thin conductive wire having a non-linear configuration... | 05/05/1981 |
| 4265012 | Device for collecting windings in stators or the like Apparatus for collecting windings in a stator or the like includes a collecting tool having collecting lamellae disposed in a ring, an aligning star piece, and means for moving the aligning star piece from a retracted position to an alignment position bet... | 05/05/1981 |
