Patents Assigned to E
  • Patent number: 4936936
    Abstract: A process for forming a composite useful as an exterior vehicle part that has the following layered components:a. a layer of a glossy clear acrylic thermoplastic finish bonded firmly tob. a layer of an acrylic thermoplastic pigment containing paint firmly bonded toc. a flexible thermoformable polymeric material that is bonded tod. a thick rigid synthetic resinous substrate;The resulting composite and thermoformable laminate that can be made into the above composite having the layers a.-c. of the above structure also are part of this invention.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: June 26, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Frank Rohrbacher
  • Patent number: 4936923
    Abstract: Azeotropic mixture of 1,1,2-trichlorotrifluoroethane (CFC-113) with cis-1,2-dichloroethylene and n-propanol or isopropanol with or without nitromethane, the azeotropic mixtures being useful in solvent cleaning applications.One azeotrope-like "mixture contains about 88-96 weight percent 1,1,2-trichlorotrifluoroethane, about 4-10 weight percent cis-1,2-dichloroethylene and about 0.1-2.0 weight percent n-propanol and boils at about 47.degree. C. at essentially atmospheric pressure. A second azeotrope-like mixture contains about 87-97 weight percent 1,1,2-trichlorotrifluoroethane, about 2-8 weight percent cis-1,2-dichloroethylene and about 1-5 weight percent isopropanol and boils at about 45.degree. C. at essentially atmospheric pressure. A third azeotrope-like mixture contains about 88-98 weight percent 1,2,2-trichlorotrifluoroethane, about 1-7 weight percent cis-1,2-dichloroethylene, about 1-5 weight percent isopropanol and about 0.1-2.0 weight percent nitromethane.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: June 26, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abid N. Merchant, Robert A. Gorski
  • Patent number: 4937573
    Abstract: A variable-length prefix/suffix step code is combined with words for high frequency transmission. The words with the code attached are compacted into constant length packets at the transmission end and are successively extracted at the receive end. The code permits the two operations of extraction and decoding to be separated at the receive end; this is essential in high speed applications where these operations cannot be performed simultaneously within one clock cycle. The code also permits the extraction operation to be simplified by considerably reducing the size of the necessary hardware. The efficiency of processing messages with a particular probability distribution (e.g. video signals) is very high (97-98%).
    Type: Grant
    Filed: November 4, 1987
    Date of Patent: June 26, 1990
    Assignee: Telettra Telefonia Elettronica e Radio SpA
    Inventors: Cucchi Silvio, Corradi Vittorio, Capriata Stefano
  • Patent number: 4934819
    Abstract: The value of a transverse moment of any order of the electromagnetic field associated with an optical beam (and in particular the spot-size of such a beam) is determined by two successive measurements of the optical power of the beam: one measurement is a direct measurement, the other is effected after spatially modulating the transverse distribution of the electromagnetic field by a factor proportional to the n-th power of the transverse coordinate of the beam, n being the moment order. The moment can be obtained from the ratio between the two measurements. The invention includes also the apparatus for carrying out the method.
    Type: Grant
    Filed: November 8, 1984
    Date of Patent: June 19, 1990
    Assignee: CSELT - Centro Studi E Laboratori Telecomunicazioni S.p.A.
    Inventors: Gianni Coppa, Pietro Di Vita, Umberto Rossi
  • Patent number: 4935274
    Abstract: A lid structure for a polypropylene container is formed of a three ply laminate and a rehealable silicone rubber top layer adhered to the laminate. The laminate is polyester, polyvinylidene chloride and polypropylene heat sealed to the top rim of the container.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: June 19, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John A. DeBenedictis, Carl F. Morin, Joshua Benin, James A. Lawler
  • Patent number: 4935477
    Abstract: Amorphous copolymers of perfluoro-2,2-dimethyl-1,3-dioxole with at least one fluoro comonomer selected from one or more of ten defined classes having a recited minimum mole proportion of perfluoro-2,2-dimethyl-1,3-dioxole, in no event less than 65%, have high glass transition temperatures of 140.degree. C. or higher, low indices of refraction, and good physical properties, and low dielectric constants, which make them suitable for cladding optical fibers as well as for many electronics applications, including the manufacture of substrates for circuit boards. They all are soluble at room temperature in perfluoro(2-butyltetrahydrofuran), which makes it practical to apply them as coatings from solution.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: June 19, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edward N. Squire
  • Patent number: 4935328
    Abstract: Electrostatic liquid developer having improved negative charging characteristics consisting essentially of(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,(C) charge director compound, and(D) at least one soluble solid or liquid organic monofunctional amine compound of the formula: R.sub.n NH.sub.3-n wherein R is alkyl, cycloalkyl or alkylene, or substituted alkyl, the alkyl, cycloalkyl, alkylene or substituted alkyl group being of 1 to 50 carbon atoms, and n is an integer of 1 to 3.Optionally, a colorant, e.g., a pigment; metallic soap, adjuvant can be present. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.
    Type: Grant
    Filed: April 7, 1988
    Date of Patent: June 19, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Lyla M. El-Sayed, James R. Larson, Torence J. Trout
  • Patent number: 4935574
    Abstract: A silica catalyst that retains its high initial activity for a longer time is obtained by forming the catalyst from an aquasol that was obtained by mixing an alkali metal aluminate with an aqueous solution of alkali metal silicate.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: June 19, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael B. D'Amore, Nutan K. Pande
  • Patent number: 4935521
    Abstract: Preparation of 3-picoline from 2-methylglutaronitrile in which the by-products, i.e., 3-methylpiperidine, 2-amino-3-picoline, and 2-amino-5-picoline are recycled and converted to 3-picoline.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: June 19, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ronald L. Amey
  • Patent number: 4934447
    Abstract: Device to intensify the magnetic field in an ingot mould, the device cooperating with an ingot mould body (10) and with a means (11) which is positioned outside an outer jacket (14) of the ingot mould body (10) and generates a magnetic field, whereby independent, replaceable auxiliary extension pole pieces (18) stretching substantially towards a crystallizer (12) are comprised within outer jacket (14) of the mould body (10) in correlation with pole pieces (16).
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: June 19, 1990
    Assignee: Danieli & C. Officine Meccaniche SpA and Ceda SpA Costruzioni Elettromeccaniche e Dispositivi d'Automazione
    Inventor: Lorenzo Ciani
  • Patent number: 4935151
    Abstract: In a process for degassing and filtering liquids, particularly coating emulsions, a feed stream (F) is subdivided into a process stream (N), which is fed continuously to a process use through a main filter (16), and a recycled fractional stream. The fractional stream (T) is used to backflush successive sections of the main filter (16) and in turn is filtered through a supplementary filter (21, 22). In the apparatus for the process, a backflushing device (17) is associated with the main filter (16), the fractional stream (T) is used as a flushing means and the filter surface of the main filter (16) is cleaned progressively. Thus, a liquid with a continually constant grain size distribution, without gas bubbles and particles that cause defects, can be delivered continuously to the specific use.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: June 19, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dac-Vong Do
  • Patent number: 4935252
    Abstract: A package for cooking a waffle in a microwave oven is provided, comprising a microwave transparent tray about 28 to 38 mm deep, a lossy susceptor film lid having defined reflectance and absorbance, placed about 3 to about 10 mm over the waffle, providing means for moisture to escape. The waffle is coated with an edible food conditioner, to provide improved microwave susceptibility to the surfaces of the waffle. The waffle may be cooked alone or in the presence of a sausage side dish.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: June 19, 1990
    Assignees: E. I. Du Pont de Nemours and Company, Campbell Soup Company
    Inventors: Hua-Feng Huang, Frederick E. Simon
  • Patent number: 4935295
    Abstract: A process is disclosed for manufacturing a high strength composite structure by needling individual webs of initially spunbonded material and then needle-punching a stack of the individual webs to enmesh and entangle filaments across the webs, with little or no loss of the initial filament-related strength.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: June 19, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Franco L. Serafini
  • Patent number: 4934561
    Abstract: Apparatus and method for enabling viscous fluids to be discharged from a container. The container is provided with an outlet positioned for gravity discharge of the contents. Microwave energy is delivered to an inlet opening of the container for the purpose of heating the stored fluids in a controlled area which includes the inlet and outlet. The microwave energy is effective to heat the viscous fluids to a flowable state while fluids are simultaneously discharged from the outlet. The energy level can be controlled based on the level of viscous fluid in the tank so that the viscous fluid is not overheated.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: June 19, 1990
    Assignee: John E. Althaus
    Inventors: John B. Ness, John E. Althaus
  • Patent number: 4935047
    Abstract: A motor vechicle steering wheel lock for mounting diametrically across the rim of the steering wheel and having an extended portion adapted to block complete rotation of the steering wheel has locking means which simplify and reduce the number of manual manipulation required to mount and remove the steering wheel lock. A locking means is provided to permit only axial extension of the elongated steering wheel lock when in the locked condition, and to permit axial contraction of the elongated steering wheel lock only when in the unlocked condition.
    Type: Grant
    Filed: December 20, 1988
    Date of Patent: June 19, 1990
    Assignees: James E. Winner, Jr., Donna C. Winner
    Inventor: Jinn F. Wu
  • Patent number: 4935421
    Abstract: Novel compounds of the general formula ##STR1## wherein Ar represents a substituted or unsubstituted aromatic or heterocyclic group; W represents alkylene of from 1 to about 10 carbon atoms; and B represents --NR.sub.2 COR.sub.1, --NR.sub.2 CONR.sub.1 R.sub.3, --NR.sub.2 SO.sub.2 R.sub.1, --NR.sub.2 SO.sub.2 NR.sub.1 R.sub.3, or --NR.sub.2 COOR.sub.1 wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.1 is not hydrogen when B is --NR.sub.2 SO.sub.2 R.sub.1 or --NR.sub.2 COOR.sub.1, or R.sub.1 and R.sub.3 may together with N form a 5 to 7 membered heterocyclic group; and the pharmaceutically acceptable salts thereof. These compounds exhibit .beta.-adrenergic blocking activity and are also useful in the treatment of glaucoma.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: June 19, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Sheung T. Kam, William L. Matier
  • Patent number: 4935490
    Abstract: Aromatic polyimides of the formula: ##STR1## where --Ar-- is ##STR2## --Ar'-- is ##STR3## --Ar"-- is ##STR4## where --Z, and --Z.sub.1, independently are --Cl, --Br or --I; where --X, --X.sub.1, --X.sub.2 and --X.sub.3 independently are --CH.sub.3 or --C.sub.2 H.sub.5 ; and --Y,--Y.sub.1,--Y.sub.2 and --Y.sub.3 are primary or secondary alkyl groups having 3 to 12 carbon atoms, provided that when m is greater than 0, r is 0 and that when L is greater than 0, r and s are 0, are disclosed. These polyimides are very soluble, even in weak solvents such as toluene.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: June 19, 1990
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: Richard A. Hayes
  • Patent number: 4935558
    Abstract: A process for the preparation of 1,1,1,2-tetrafluoroethane by reacting 1,1,1,2-tetrafluoro-2-chloroethane in a polar aprotic solvent with zinc in the presence of a proton source at a temperature from about 65.degree. C. to about 250.degree. C.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: June 19, 1990
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Carl G. Krespan, Leo E. Manzer
  • Patent number: 4935422
    Abstract: Compounds of the present invention, are represented by the general formula ##STR1## wherein R represents a straight or branched loweralkyl from 1 to about 6 carbon atoms, loweralkene from 2 to about 6 carbon atoms, or ##STR2## where m is o or 1 and n is 2, 3, 4, or 5 provided that when m is o, n is 2, 3, 4, or 5 and when m is 1, n is 3 or 4, and R.sub.1 is hydrogen, a straight, branched or cyclic loweralky from 1 to about 6 carbon atoms or loweralkoxy, phenyl or substituted phenyl, and R.sub.2 represents a straight or branched loweralkyl from 1 to about 6 carbon atoms or W-B wherein W represents alkylene of from 1 to about 10 carbon atoms which may be substituted with loweralkyl of from 1 to about 4 carbon atoms; and B represents hydrogen, --NHCOR.sub.4, or --NHCONR.sub.3 R.sub.4, wherein R.sub.3 and R.sub.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: June 19, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ghanshyam Patil, Khuong H. X. Mai
  • Patent number: 4935493
    Abstract: A compound having the structure ##STR1## where T is of the fomrula ##STR2## where each D.sup.1 and D.sup.2, independently, is a hydroxyl group of a group which is capable of being hydrolysed to a hydroxyl group in aqueous solution at physiological pH; a group of the formula ##STR3## where G is either H,F or an alkyl group containing 1 to about 20 carbon atoms and optional heteroatoms which can be N, S, or O; or a phosphonate group of the formula ##STR4## where J is O-alkyl, N-alkyl, or alkyl, each comprising about 1-20 carbon atoms and, optionally, heteroatoms which can be N, S, or O; T being able to form a complex with the catalytic site of an enzyme, X is a group having at least one amino acid, ##STR5## and each R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 is separately a group which does not interfere significantly (i.e., does not lower than Ki of the compound to less than 10.sup.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: June 19, 1990
    Assignees: E. I. Du Pont de Nemours and Company, New England Medical Center Hospitals, Inc., Tufts University
    Inventors: William W. Bachovchin, Andrew G. Plaut, Charles A. Kettner