Abstract: A tie-type security seal having a seal body (1) with internal locking teeth (5) in a tunnel (2) and an elongate element (11) having a series of sealing formations (14) therealong. The free end (13) of the elongate element (11) may be passed through the tunnel (2) so that the sealing formations (14) successively cooperate with the teeth (5) on tightening the loop so formed. According to the invention, a locking accessory (9) integral with the seal body (1) is formed with a through opening (15) having a shape substantially identical to the cross section of the elongate element (11) and at least one flexible edge part (16) to adjust itself to the differences in the said cross section in the regions of the regions of the sealing formations. The accessory (9) is foldable with respect to the seal body (1) so that the through opening (15) is superimposed on the open outlet (4) of the tunnel (2) in the seal body.
Type:
Grant
Filed:
March 14, 1995
Date of Patent:
June 16, 1998
Assignee:
ELC Produtos de Seguranca E Comercio LTDA.
Abstract: An integral activated sludge wastewater treatment system has a vessel having at least one internal baffle dividing the vessel into at least one treatment chamber and at least one settling chamber. The settling chamber is at least partially defined by a first wall of the baffle. The treatment chamber is at least partially defined by a second wall of the baffle. A recycle pump is provided for recycling aerated wastewater from the treatment chamber back into the settling chamber and inducing a downward sludge velocity in excess of the velocity that would be caused by gravity alone.
Abstract: A novel dry thinned starch produced by continuously feeding a mixture of a base starch and a chemical which hydrolyses the glycosidic linkage of starch to a plug flow reactor, passing the mixture through the reactor, recovering the mixture and neutralizing the mixture. The present invention also includes starches produced by the process and paper products produced from the starch and coated with the starch.
Type:
Grant
Filed:
October 13, 1995
Date of Patent:
June 16, 1998
Assignee:
A. E. Staley Manufacturing Co.
Inventors:
Cameron E. Ferguson, Lawrence S. Ferro, Robert Mooth, Michael D. Harrison
Abstract: Novel intermediates having an indolenine nucleus which are useful in the synthesis of fluorescent sulfoindocyanine dyes are described. Dyes synthesized using such intermediates do not contain a reactive group that will covalently attach to a target molecule at an amine- or hydroxy-containing site. Rather, these intermediates are linked to an enzyme substrate or a member of a specific binding pair. Also included are tyramide-containing sulfonidocyanine dyes.
Type:
Grant
Filed:
June 4, 1997
Date of Patent:
June 16, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Mark Norman Bobrow, Thomas Joseph Erickson
Abstract: Lubricant-containing pellets of thermoplastic resins which have a continuous lubricant film firmly adhering to the surface of the pellets are created by a process which mixes and combines uncoated pellets of thermoplastic resins with a metal salt of a fatty acid lubricant at a temperature of from 20.degree. C. to 50.degree. C.
Type:
Grant
Filed:
October 11, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Klaus Josef Maria Michels, Rolando Umali Pagilagan
Abstract: A coating composition of a film forming binder and an organic liquid carrier; wherein the binder contains about(a) 10-90% by weight, based on the weight of the binder, of a dispersed gelled acrylic polymer having a glass transition temperature of at least 20.degree.
Type:
Grant
Filed:
December 17, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Robert John Barsotti, Laura Ann Lewin, Christopher Scopazzi
Abstract: This invention relates to a process of preparing a ruthenium complex of the formula RuH.sub.2 (PR.sub.3).sub.2 L.sub.2 wherein PR.sub.3 is an organophosphorus ligand and L is H.sub.2 or PR.sub.3 ; a catalyst comprising at least one ruthenium complex having the formula RuH.sub.2 (PR.sub.3)L.sup.1.sub.3 wherein L.sup.1 is a neutral electron pair donor ligand; a process for preparing the catalyst and its use in situ in the hydrogenation of nitriles.
Type:
Grant
Filed:
June 21, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Richard Paul Beatty, Rocco Angelo Paciello
Abstract: An apparatus and method for the cordless remote control of a filling function of a mobile vehicle that includes a signal transmitter (12) and a liquid level sensor (14) that is mounted on a tank (18) of a mobile vehicle (16). The liquid level sensor (14) transmits a full signal to a remote signal receiver (22) by way of the signal transmitter (12). The full signal closes a control valve (26) interupting the flow of the fluid to the tank (18) by way of a conduit 28. An adjustable timer (44) provides a system safety back-up signal that closes the valve (26) if the full signal is not received within a preset time period. This apparatus and method can be operated in a semi-automatic mode or an automatic mode by the addition of an adjustable delay clock/timer (42). Audible and/or visual indicators are provided for monitoring the status of the filling operation.
Abstract: A carpet underlay comprising a fibrous nonwoven substrate composed of natural or synthetic fibers having in or on it a repellent finish which makes said substrate substantially imprevious to liquids, and a carpet having an underlay substantially impervious to liquids affixed to the carpet back rendering said carpet substantially impervious to liquids are disclosed.
Type:
Grant
Filed:
September 18, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Peter Michael Murphy, Edward James Greenwood, Joyce Monson Materniak
Abstract: Compositions are disclosed which include 1,1,2,2-tetrafluoroethane and a propane, tris(trifluoromethyl)amine, trifluoromethylsulfur pentafluoride or fluoroethane. The term propane includes compounds of the formula C.sub.3 F.sub.a H.sub.8-a wherein 0.ltoreq.a.ltoreq.8 as well as cyclic compounds of the formula C.sub.3 F.sub.b H.sub.6-b wherein 0.ltoreq.b.ltoreq.6. These compositions are useful as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
Type:
Grant
Filed:
April 23, 1997
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Barbara Haviland Minor, Donna Marie Patron, Diana Lynn Klug, Brooks Shawn Lunger
Abstract: A durable image is formed by printing a pigmented aqueous ink onto a substrate bearing a hydrophilic thermoplastic polymer having cross-linking groups, then heating the printed image to encapsulate the pigment and cross-link the polymer.
Type:
Grant
Filed:
November 22, 1995
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Zarng-Arh George Wu, Robert Paul Held, Jon Gregory Moehlmann
Abstract: Disclosed herein is a novel crystalline form of low molecular weight poly(trimethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(trimethylene terephthalate) material by means of rapid heat transfer to or from the material. The poly(trimethylene terephthalate) composition is suitable for use as a starting material for solid-state polymerization in order to produce polymers of higher molecular weight.
Type:
Grant
Filed:
December 12, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours & Company
Inventors:
Jan M. Stouffer, Elwood Neal Blanchard, Kenneth Wayne Leffew
Abstract: The present invention provides fiber optic couplers for use with at least three optic fibers. The optic fibers arranged in a linear array, that is, the optic fibers are coupled side by side. The fibers along either end of the linear-array are coupled only to a single fiber, while the remaining fibers are generally coupled between only two adjacent fibers. Generally, at least one of the fibers has a propagation constant different than the other fibers. Such variations in the propagation constant are used to vary the coupling coefficients among the fibers of the linear-array, thereby providing a repeatable mechanism, to vary coupled power ratios among the fibers of the coupler. Theoretical calculations and empirical experience have shown that varying the propagation constant of fibers among a linear-array, generally by pre-pulling the fibers by varying amounts, allows repeatable manufacturing of 1.times.3, 3.times.3, 1.times.4, 4.times.4, 1.times.N and even N.times.
Type:
Grant
Filed:
November 13, 1996
Date of Patent:
June 9, 1998
Assignee:
E-Tek Dynamics, Inc.
Inventors:
Jing-Jong Pan, Ming Shih, Weiti Wu, Yu-Li Ko, Donna S. Yu
Abstract: An aquaculture system for growing aquatic animals such as fish and crustaceans is shown and described. A rigid-walled floating tank is positioned in a body of water, a volume of water being provided to the tank via a floating pump assembly that is positioned in the body of water external to the tank. An inlet of the pump assembly is movable and may be positioned in a desired location and depth of the body of water, such that clean water that is free of surface contaminants and that is at a selected temperature is provided to the tank. The introduction of new water to the tank displaces and discharges a volume of water from the tank, thereby renewing the oxygen source in the tank and removing dissolved waste products such as ammonia. Additional oxygen may be injected into the water at different locations via oxygen diffusers.
Abstract: Azeotropic or azeotrope-like compositions of effective amounts of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 1,1-dichloroethane and an alcohol such as methanol, ethanol, or isopropanol, to form an azeotropic or azeotrope-like composition are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids.
Type:
Grant
Filed:
February 24, 1997
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Abid Nazarali Merchant, Barbara Haviland Minor
Abstract: A partially-fluorinated surfactant having internal methylene groups and having the formula R.sub.f --(CH.sub.2).sub.m --R'.sub.f --COOM wherein m is 1-3, R.sub.f is perfluoroalkyl or perfluoroalkoxy, containing 3-8 carbon atoms, R'.sub.f is linear or branched perfluoroalkylene containing 1-4 carbon atoms, and M is NH.sub.4, Li, Na, K, or H is useful in polymerization of fluorinated monomers. High molecular weight can be achieved in homopolymerization of tetrafluoroethylene.
Type:
Grant
Filed:
July 1, 1997
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Andrew E. Feiring, Ming-Hong Hung, Jose M. Rodriguez-Parada, Roger J. Zipfel
Abstract: Process for making an oriented polyester article with improved hydrolytic stability involves blending a polyester resin with (a) polyalkylene glycol which may be alkoxy end capped and (b) optionally a further compound of glycidyl ether carbodiimide, keteneimines, aziridines or isocyanate, heating to form a melt and forming the melt into an oriented article.
Type:
Grant
Filed:
October 28, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Raymond Guilford Hunter, Donna Lynn Visioli
Abstract: A process for spinning a fully water washed fluorinated olefinic polymer intermediate fiber structure from a mixture of an aqueous dispersion of particles of the fluorinated olefinic polymer and a solution of a cellulosic ether.
Type:
Grant
Filed:
December 20, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
Nicole Lee Blankenbeckler, Joseph Michael Donckers, II, Warren Francis Knoff
Abstract: A nonwoven bulky composite sheet material as first and second vapor permeable layers on opposite sides of a third layer of a bulky, flexible material. The third layer has a thickness in the range of 0.3 to 3.0 mm before being bonded between said first and second layers. The first layer, the second layer and the third layer are bonded together to form a flexible composite sheet with a thickness of at least 0.3 3 mm and a moisture vapor transmission of at least 100 g/m.sup.2 in 24 hours.
Type:
Grant
Filed:
May 10, 1996
Date of Patent:
June 9, 1998
Assignee:
E. I. du Pont de Nemours and Company
Inventors:
David Charles Jones, Stasys Kestutis Rudys, Charles Benjamin Simon
Abstract: A grapple includes a ferrous body with a plurality of tines pivotally connected thereto. A magnetic coil is disposed within the ferrous body. When the magnetic coil is energized, it creates a magnetic field within the area defined by the tines. The tines are also magnetized by the field. Additional magnetic coils may be added to one or more of the tines.
Type:
Grant
Filed:
August 8, 1996
Date of Patent:
June 9, 1998
Assignees:
Carlton G. Smith, Steven B. Begyn, David M. Futa, Lance E. Long, Jack Long