Patents Represented by Law Firm Irons & Sears
  • Patent number: 4184963
    Abstract: Covers an immersible molecular filter unit having a body that is formed from a porous polymeric material of generally cylindrical shape, preferably rounded at least at one of its ends. A tubular connector is mounted at one end of this body, with a bore that communicates with the porous network of the body. An anisotropic membrane encapsulates the body and is formed with an integral collar portion that engages about a portion of the connector, where it projects from the body, in substantially fluid-tight fashion. Preferably the membrane, which is formed in situ, is shrunk about the tube and the body, and is solvent welded to the connector.This unit is formed by dipping the body and the juxtaposed connector in a polymer casting solution, to encapsulate the porous body and a part of the connector. The dip-coating unit is then converted to an anisotropic membrane.
    Type: Grant
    Filed: October 28, 1977
    Date of Patent: January 22, 1980
    Assignee: Millipore Corporation
    Inventor: Shmuel Sternberg
  • Patent number: 4172323
    Abstract: The adhesive bonding of a pontic tooth to the two adjacent, natural abutment teeth is improved, particularly in resistance to shearing forces, by an improved adhesive bonding system. In this system, adhesive is applied to the previously prepared surfaces of the abutment teeth, and a thin screen or perforated film or foil is embedded in the adhesive on each tooth surface, conformed to the shape of the prepared surface, and penetrated by the adhesive. In one preferred embodiment, the adhesive wets and penetrates the surface of the artificial pontic that is being secured in place, the previously prepared abutment tooth surfaces, and the screens or films or foils, so that upon curing, an integral mass results that is mechanically strong, particularly in resistance to shear. The system is useful with natural or artificial teeth, can be used to install fixed bridges, and is useful for splinting.
    Type: Grant
    Filed: May 6, 1977
    Date of Patent: October 30, 1979
    Assignee: Lee Pharmaceuticals
    Inventor: Jan A. Orlowski
  • Patent number: 4164148
    Abstract: A test for determining the sulfur content of the base cast iron used for the production of nodular iron or iron containing compacted graphite. A sample of the molten base cast iron is removed from the melt, then a known amount of a nodular iron inoculant or a compacted iron inoculant is added to the molten metal. The molten metal sample is then cast into test bar or test wedge, solidified and tested to determine whether the bar or wedge is nodular iron or iron containing compacted graphite. The test may be fractured and inspected to visually determine whether the fracture is gray or white. Alternatively, the wedge or bar may be ultrasonically tested to determine whether the wedge or bar contains flake graphite or nodular graphite or compacted graphite. As a further alternative, the cooling or solidification curve of the molten metal sample, after inoculation, can be determined and compared with the cooling curve from a molten base cast iron sample.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: August 14, 1979
    Inventor: Henry A. Laforet
  • Patent number: 4160926
    Abstract: Void-free resin impregnated electric motors and generators, the process for producing their void-free resin impregnation and a preferred resin for producing void-free impregnation including a low viscosity, essentially 100 percent solids (i.e. solventless) synthetic resinous material, a thixotropic agent, a surface active agent and/or a diluent are disclosed.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: July 10, 1979
    Assignee: The Epoxylite Corporation
    Inventors: Lloyd S. Cope, Ladislav J. Rejda
  • Patent number: 4153076
    Abstract: A pneumatic valve apparatus comprises a cylindrical structure having opposite, outwardly facing faces. A plurality of two-position valves are located in the structure at regular angular intervals at positions about the axis of the cylindrical structure. The valves are subject to mechanical actuation by axial displacement. A spindle co-axial with the axis has a passageway for the flow of air toward each axial end of the spindle. A pair of pawls are carried by the spindle, one on each side of the faces, for limited axial displacement and rotatable with respect to the cylindrical structure about the axis. The pawls are angularly displaced from each other so that when one pawl is aligned with a valve, the other pawl is angularly and axially misaligned. Resilient means (spring 6) urge the pawls axially away from the faces.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: May 8, 1979
    Assignee: Waters Associates, Inc.
    Inventors: Roderick J. McNeil, Burleigh M. Hutchins
  • Patent number: 4147343
    Abstract: An acrobatic amusement device comprising an outer wheel affixed to a stationary platform. The outer wheel has a track on its inner circumference and a riding unit is supported within the outer wheel for movement relative to this track. The riding unit comprises frame members having three rotatable wheels thereon which mate with the outer wheel track at two places on one side of a diameter of the outer wheel and at one place on the other side of that diameter. The riding unit can be given a motion relative to the track and rotary within the outer wheel about an axis coincident with the axis of that wheel to provide amusement and thrill for an occupant sitting upon the riding unit. A locking device may be provided to hold the riding unit in fixed relationship with respect to the outer wheel to allow the rider to mount and dismount from the riding unit, and a seat belt may be provided which must be fastened before the locking device will release.
    Type: Grant
    Filed: June 2, 1978
    Date of Patent: April 3, 1979
    Inventors: Phillip R. Hyde, Samuel J. Lewis
  • Patent number: 4141115
    Abstract: A process and apparatus for cutting textile tow into staple is disclosed. The textile tow is wound onto a textile tow support which is rotatable at a predetermined angular velocity. A plurality of moveable cutting surfaces are attached integrally to the textile tow support around its periphery to permit the tow to be wrapped in surface contact with the cutting surfaces. The tow is cut into staple by transverse or orthogonal movement of the cutting surfaces with respect to the direction of winding of the textile tow on the textile tow support. In a first embodiment of the invention, the cutting surfaces comprise knife bands which are driven by rotation of the textile tow support. In the second embodiment, the cutting surfaces comprise reciprocating knives which are driven by rotation of the textile tow support.
    Type: Grant
    Filed: January 25, 1977
    Date of Patent: February 27, 1979
    Inventors: Franz Fourne, Ursula Fourne
  • Patent number: 4125979
    Abstract: Lightweight and structurally efficient construction or building units of cementitious materials and the method of making these units. Prefabricated cementitious strips or slabs are aligned with their longitudinal axes parallel and rigidly held in the desired orientation with each other, preferably with the use of spacer/connectors. Stressed or unstressed reinforcement elements can also be placed parallel to the lines of junction between the strips or slabs by attaching them to the spacer/connectors. Continuous prisms of cementing material or cement mortar are then applied along the junction of the strips or slabs and around the reinforcement to structurally bond all the components into an integral unit. The units are characterized by a constant cross section of relatively thin structural parts and voids normal to a major longitudinal axis. They can be massive or small depending on the particular application for which they are made.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: November 21, 1978
    Inventor: Robert R. McLaughlin
  • Patent number: 4119540
    Abstract: The filter has a filtering chamber in which a number of hollow filtering elements are arranged on a circle about the axis of the filter. The chamber has a liquid inlet and a liquid outlet and the hollow filtering elements communicate in parallel with the inlet and outlet. A hollow arm defining a passageway is rotatable about the axis of the filter and the passageway is capable of putting all the inlets of the filtering elements successively in communication with an impurities discharging chamber in which prevails a pressure lower than the pressure of the filtered liquid. The arm is connected to rotate with the driven member of a unidirectional step-by-step drive mechanism. The arm is also connected to rotate with the driven member of a second unidirectional step-by-step drive mechanism in the same direction as with the first drive mechanism.
    Type: Grant
    Filed: December 9, 1977
    Date of Patent: October 10, 1978
    Assignee: Rellumit-Inter
    Inventor: Jean-Claude Muller
  • Patent number: 4116646
    Abstract: The arrangement of the disclosure comprises a filter unit having an upper, inlet chamber and a lower, outlet chamber. A hydrophilic filter separates the upper chamber from the lower chamber and a lower placed hydrophobic filter or membrane separates the lower chamber and the upper chamber. A liquid reservoir is provided in the first chamber between the filter and membrane, and a gas reservoir is provided in the second chamber between the filter and membrane.A liquid admitted to the upper, inlet chamber with a forward differential pressure, that is with the pressure in the upper chamber larger than that in the lower chamber, will flow through the upper hydrophilic filter into the lower chamber. If any gas accumulates it cannot accumulate above the level of the lower hydrophobic membrane. Accordingly no gas flows out of the lower, outlet chamber in the forward direction.
    Type: Grant
    Filed: May 20, 1977
    Date of Patent: September 26, 1978
    Assignee: Millipore Corporation
    Inventor: James H. Edwards
  • Patent number: 4110701
    Abstract: The measuring system of the disclosure has two oscillators of different frequencies. The oscillations of the high frequency oscillator are counted for a time corresponding to a portion, for example one-eighth, of the period of the low frequency oscillator. If the count is less or greater than a selected count, for example 4,096, the frequency of the low frequency oscillator is corrected by approximately one high frequency period in the one-eighth low frequency period. By this method the oscillators are brought into near-synchronism, so that there are counted exactly 4,096 high frequency oscillations during the one-eighth period of the low frequency oscillator, but neither 4,097 or more, nor 4,095 or less. The correction is accomplished by excluding or including one at a time, various resistors in the frequency determining portion of the low-frequency circuit by the use of transmission gates in parallel with the resistors. The system may be used to measure, for example, weight.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: August 29, 1978
    Assignee: CGS Systems, Inc.
    Inventor: Albert H. Medwin
  • Patent number: 4107845
    Abstract: Adhesive dental restorative composite comprising a suspension of filler fibers in a liquid polyacrylate resin composition wherein the resin has a viscosity of less than 5000 centipoise. The fibers which may be organic or inorganic generally have lengths of 1 to 100 microns and diameters which are from 1/20 to 1/5 of the lengths. An amine accelerator and a peroxide catalyst for the acrylate resin are included in the composite. The fibers comprise from 30% to 70% by weight of the composite.The referred resin formulation comprises from 25% to 90% by weight of a polyethyleneglycol diacrylate and from 10% to 75% by weight of an aromatic or alicyclic polyacrylate compound.An especially preferred composite is one wherein the resin comprises 40 parts triethyleneglycol dimethacrylate to 60 parts bisphenol-A-bis(3-methacrylato-2-hyroxypropyl) ether having suspended therein calcium silicate fibers having an average length of 5.
    Type: Grant
    Filed: December 16, 1976
    Date of Patent: August 22, 1978
    Assignee: Lee Pharmaceuticals
    Inventors: Henry L. Lee, Jr., Jan Alexander Orlowski
  • Patent number: 4102856
    Abstract: Dental restorative compositions are described comprising a finely divided filler mixed with a resin binder that can be activated to cause it to set in situ after application to a tooth surface or within a tooth cavity. The resin binder has as its primary component the reaction product of an alicyclic diacid (or its anhydride) polyfunctional material that has been reacted to form an ester with each of two acrylate or methacrylate materials, which may be the same but that preferably are different.
    Type: Grant
    Filed: February 15, 1977
    Date of Patent: July 25, 1978
    Assignee: Lee Pharmaceuticals
    Inventor: Henry L. Lee, Jr.
  • Patent number: 4101423
    Abstract: A tubular element for removing particulate matter and bacteria of dimensions in excess of a predetermined value from a fluid flowing from the interior to the exterior of the filtration element has a first inner layer of a highly porous material that has a low coefficient of sliding friction, and a second layer of a microporous filtration material having pores of substantially uniform size. The element may include an outer support layer of a porous material that is not subject to shedding. In a preferred form, the inner layer is formed from a high wet strength paper, the microporous filtration layer has sufficiently small pores to remove all bacteria from the fluid, and the outer layer may be a fine porous plastic sheet material or a high wet strength, high porosity paper that is impregnated with the polymeric material that forms the microporous filtration material. The fine pore structure of the outer layer supports the fragile filtration layer.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: July 18, 1978
    Assignee: Millipore Corporation
    Inventors: Wayne S. Merrill, James H. Edwards, Bernard R. Danti
  • Patent number: 4094195
    Abstract: An automatic liquid sample-injecting apparatus using a conduit such as a hypodermic needle or pipette to suck liquid from a sample source and transfer it to an injector valve apparatus. The apparatus utilizes the optimum embodiment of the apparatus being equipped with (a) novel seal means adapted to exert a radial thrust or wiping action on the conduit and (2) novel conduit working means featuring both a drip-proof means to supply a non-contaminating solvent for washing the exterior of the needle and means to remove such solvent, all without interfering with the use of the needle in a series of automatic injections.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: June 13, 1978
    Assignee: Waters Associates, Inc.
    Inventors: David R. Friswell, Lawrence J. Finn
  • Patent number: 4094196
    Abstract: An automatic liquid sample-injecting apparatus using a conduit such as a hypodermic needle or pipette to suck liquid from a sample source and transfer it to an injector valve apparatus. The apparatus utilizes the optimum embodiment of the apparatus being equipped with (1) novel seal means adapted to exert a radial thrust or wiping action on the conduit and (2) novel conduit working means featuring both a drip-proof means to supply a non-contaminating solvent for washing the exterior of the needle and means to remove such solvent, all without interfering with the use of the needle in a series of automatic injections.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: June 13, 1978
    Assignee: Waters Associates, Inc.
    Inventor: David R. Friswell
  • Patent number: 4094641
    Abstract: Low loss sample bottle assembly from which very small quantities of liquid can be removed safely, automatically and very nearly completely. The assembly comprises a spring mounted bottle having a small bottom compartment shaped to receive a needle and so sized with respect to the needle that substantially all liquid is forced from the compartment to an upper chamber and into the needle. The bottle is best equipped with a disposable, one piece, septum-like cap.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: June 13, 1978
    Assignee: Waters Associates, Inc.
    Inventor: David R. Friswell
  • Patent number: 4080294
    Abstract: A filtration system is provided that directs a fluid to be filtered through a disposable tubular filtration element, supports the filtration element, and accommodates for "wet growth" of the filtration element. The system operates with an inside-to-outside forced fluid flow through the filtration element and includes a generally cylindrical housing with a fluid inlet and outlet. A perforated outer support screen is mounted within the housing and surrounds the walls of the tubular filtration element with slight clearance. Under the influence of the fluid pressure and the wet growth, the walls of the filtration element bear against the screen. A sealing and support assembly having upstream and downstream fluid guides, each carrying, in a preferred form, a pair of resilient sealing members, is positioned inside the filtration element. A rigid inner member bridges the opposing faces of the resilient member pairs.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: March 21, 1978
    Assignee: Millipore Corporation
    Inventors: James H. Edwards, Bernard R. Danti, Wayne S. Merrill
  • Patent number: 4072694
    Abstract: Dioxolane compounds useful to initiate photopolymerization and polymerizable compositions of matter containing such compounds.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: February 7, 1978
    Assignee: Lee Pharmaceuticals
    Inventor: Alan J. Brattesani
  • Patent number: 4070285
    Abstract: A column for use in liquid chromatographic processes wherein the column is formed with an external reinforcing sleeve that has been found to contribute dimensional stability which results in surprising and important advantages in improving chromatographic performance. Another aspect of the invention comprises the preparation of the internal wall of the column which has an advantageous finish of 32 micro inches or better.
    Type: Grant
    Filed: December 24, 1975
    Date of Patent: January 24, 1978
    Assignee: Waters Associates, Inc.
    Inventor: Louis Abrahams