Patents Assigned to I
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Patent number: 4125271Abstract: This invention relates to a tool suspension for mounting tools upon either the front or rear of a vehicle in the form of a three-point suspension for hydraulic lifting and lowering. A hydraulic mechanism comprising two mutually independently operable cylinder assemblies each connected to respective lower suspension arms of the three-point suspension. All hinged joints of the suspension being movable in all directions.Type: GrantFiled: June 25, 1976Date of Patent: November 14, 1978Assignee: RO-WI Rosenberg & Wilboltt I/SInventors: Alfred E. J. J. Wiboltt, Jorgen Rosenberg
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Patent number: 4125586Abstract: A process for the removal of aluminum chloride from a liquid solution thereof with the liquid metal chlorides resulting from the chlorination of titaniferous materials by mixing water and sodium chloride with the liquid solution in amounts such that the amount of water is less than equimolar with respect to the total amount of aluminum chloride and the combined amount of water and sodium chloride is at least equimolar with respect to the total amount of aluminum chloride. This process significantly decreases the corrosion of apparatus associated with the presence of aluminum chloride and substantially eliminates losses of titanium tetrachloride and ferric chloride present in the liquid solution and reduces the formation of HCl.Type: GrantFiled: January 20, 1978Date of Patent: November 14, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Hans H. Glaeser
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Patent number: 4125700Abstract: Methyl methacrylate polymer powders especially suitable for making plastisols and organosols are prepared by an improved process comprising stepwise emulsion polymerization in aqueous media in the absence of emulsifiers and surfactants and in such manner that at least most of the monomer added at each step is consumed before the addition of the succeeding portion, followed by isolation of the polymer powder by evaporation of the latex at a temperature that is at least 30.degree. C., preferably 40.degree.-50.degree. C., below the glass transition temperature of the polymer.Type: GrantFiled: March 22, 1977Date of Patent: November 14, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Boynton Graham
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Patent number: 4125125Abstract: An improved pinch valve construction wherein the pinch valve sleeve can be removed as required while the pinch valve construction is connected to mating pipe with there being no leakage of the fluid to the environment.Type: GrantFiled: May 3, 1976Date of Patent: November 14, 1978Assignee: Levi I. EzekoyeInventors: Levi I. Ezekoye, Spiros G. Raftis
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Patent number: 4125412Abstract: Titanium dioxide pigments possessing outstanding durability are prepared by a wet coating treatment in which the temperature of the slurry, pH of the slurry and addition of coating materials are carefully controlled to reduce treatment time thereby increasing throughput capability.Type: GrantFiled: September 9, 1976Date of Patent: November 14, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: William A. West
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Patent number: 4124373Abstract: Herbicidal tetrahydroindazoles of the formula: ##STR1## where Q is chlorine, bromine or methyl;X is hydrogen, methyl, chlorine, methoxy, ethoxy, or bromine;Y is hydrogen, methyl, chlorine or methoxy;V is hydrogen, methyl or chlorine; andZ is hydrogen or methyl; with the proviso that(a) when Y and Z are methyl, X must be hydrogen, methyl, chlorine, or bromine;(b) when Y is hydrogen or chlorine and V is hydrogen or chlorine and Z is hydrogen, X must be hydrogen, methyl, or ethoxy; and(c) at least one of X, Y, V or Z must be hydrogen.Type: GrantFiled: January 3, 1977Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Anthony D. Wolf
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Patent number: 4124314Abstract: A desk top justifying text writing composing machine including automatic encoding and reading control means for operating a desk top justifying reproducing machine, or for operating larger and more sophisticated printing machines capable of automatic justification. The machine will produce unjustified typed lines and will automatically encode for controlling another machine to print justified lines, as a result of a single series of manual keyboard composing operations and automatic code controlled reproducing operations for producing a justified copy of a literal text, respectively.The machine includes a delete key and automatic deleting and back spacing means that reverses the machine and deletes codes from a code medium according to previously encoded information for back space correction purposes. The machine operates much like a normal office typewriter and may be operated by a person with a little more than normal typewriting skills for encoding a justified corrected text and function control codes.Type: GrantFiled: October 15, 1976Date of Patent: November 7, 1978Assignee: R & I Patent CorporationInventors: William S. Gubelmann, deceased, by Walter S. Gubelmann, executor, William R. Grier
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Patent number: 4124600Abstract: Tetrahydrofuran is prepared by the vapor phase reaction of a compound selected from 1,4-butanediol, monoesters of 1,4-butanediol, diesters of 1,4-butanediol and mixtures thereof in the presence of water and an acid catalyst wherein the catalyst is selected from phosphoric acid on a suitable support and eta alumina at a temperature of from about 200.degree. to about 325.degree. C followed by the recovery of the tetrahydrofuran by distillation.Type: GrantFiled: May 28, 1975Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Colie L. Jenkins, Jr.
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Patent number: 4124754Abstract: A process for making sulfur-modified neoprenes, wherein chloroprene, which may be mixed with up to 20 weight percent of another unsatuated, organic monomer, is polymerized in an aqueous, alkaline emulsion in the presence of about 0.25-0.45 part of sulfur per 100 parts of total organic monomer to a conversion of at most 74%; peptization is initiated by adding to the resulting latex 0.3-1.5 parts of tetraethylthiuram disulfide or another tetraalkylthiuram disulfide, then adding sodium dibutyldithiocarbamate or another water-soluble dialkyldithiocarbamate in a ratio to tetraethylthiuram disulfide of at least 0.8:1; and peptization is contained until it is about 85-95% complete. The polymer then is isolated. Neoprenes made by this process have, when vulcanized, outstanding heat and flex resistance and superior tensile properties, tear strength, and compression set.Type: GrantFiled: December 14, 1976Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Kenneth L. Miller
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Patent number: 4123932Abstract: An improved dosimeter for monitoring working areas in which air, preferably in a relatively large volume, is pumped through the dosimeter at a controlled constant flow and any particles or vapors in the air are collected on a filter, the improvement is the use ofA variable drive pump connected to the filter and driven by an electric motor and controlled by a feed back circuit of an integrator and an amplifier and the pump maintains a constant flow of air through the dosimeter;In the operation of the dosimeter the integrator receives a signal from a pressure switch that detects changes in the flow of the air stream through the dosimeter by a change in a pressure drop of the air which is being pumped through an orifice;The dosimeter is placed in a work area and at the termination of a period of time, such as a work day, the filter is removed and the contents collected are analyzed by conventional techniques such as gas chromatography to determine a level of exposure of individuals working in that area.Type: GrantFiled: May 25, 1977Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventors: William B. Baker, Donald G. Clark
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Patent number: 4124374Abstract: Herbicidal alkyl-substituted cycloalkanapyrazoles of the formula: ##STR1## where N IS 3, 4 OR 5;R.sub.1 is hydrogen or methyl;Q is methyl;X is fluorine, chlorine, bromine, iodine, cyano or methoxy;Y is hydrogen, fluorine or chlorine;Z is hydrogen or fluorine;V is hydrogen, fluorine, chlorine or OR; andR is alkyl of 1 to 4 carbon atoms; with the proviso thatA. when n is 3, R.sub.1 is hydrogen;B. when n is 5, R.sub.1 is hydrogen, Y is hydrogen or fluorine, Z and V are hydrogen and X is fluorine, chlorine or bromine;C. when V is OR, X and Y are chlorine and Z is hydrogen;D. when V is fluorine or chlorine, X is fluorine, chlorine or bromine and Z is hydrogen.Preferred for their higher activity or favorable cost or both are those compounds of formula I where, independently,1. R.sub.1 is hydrogen and n is 4,2. Y is hydrogen or fluorine, V is hydrogen and Z is hydrogen.Most preferred for their outstanding herbicidal activity are those compounds of formula I where n is 4, R.sub.Type: GrantFiled: September 27, 1976Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Anthony D. Wolf
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Patent number: 4124653Abstract: An elastomeric blend of (A) a butadiene/acrylonitrile copolymer and (B) a copolyetherester consisting essentially of 15-95% by weight of short chain ester units derived from a dicarboxylic acid and having a molecular weight not greater than 300 and a diol having a molecular weight not greater than 250, and 5-85% by weight of long chain ester units derived from a dicarboxylic acid having a molecular weight not greater than 300 and a poly(alkylene oxide)glycol having a number average molecular weight of 400-6000, said copolyetherester having a melting point of at least 100.degree. C; the blend containing from 1-50% by weight of component (A).Type: GrantFiled: December 12, 1977Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Kenneth H. Whitlock
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Patent number: 4124384Abstract: Process for forming at least a single color image on a receptor material using photohardenable elements which contain one or more imagewise photohardenable layers toned with a toner material comprising a sublimable dye or mixture of dyes, the process comprising heating for at least 5 seconds, while in contact with a receptor material, either the toned element, the receptor material, or both, to a sublimation temperature of said dye and thereby cause at least a portion of the dye to sublime imagewise and condense on the receptor material. The temperature should not degrade the receptor or photohardenable layer. At least one non-imagewise exposed photohardenable layer may be present in the toned element. The process is useful in forming color proofs or proposed fabric patterns, color prints, projector overlays, etc.Type: GrantFiled: February 7, 1977Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: John M. Centa
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Patent number: 4124397Abstract: A process for hardening photographic gelatino-silver halide emulsions with glutaraldehyde or substituted glutaraldehydes.Type: GrantFiled: September 26, 1977Date of Patent: November 7, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventors: Werner Abele, Wolfgang Pistor, Manfred Schmidt, Harry O. Smith, Nils Spannhake
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Patent number: 4122938Abstract: An apparatus for toppling conveyed articles of rectangular outline (having opposite long sides and opposite short sides) has a travel surface; a discontinuity in the travel surface; first carrier elements traveling at a distance above and along the travel surface for advancing the articles by sliding them, on one of their short sides, on the travel surface up to the discontinuity and for advancing the articles by sliding them on one of their long sides, on the travel surface downstream of the discontinuity; and at least one second carrier element which is driven in a closed path and which engages the conveyed article or article stack as the latter reaches the discontinuity in the travel surface.Type: GrantFiled: July 5, 1977Date of Patent: October 31, 1978Assignee: S I G Schweizerische Industrie-GesellschaftInventors: Theo Walz, Fritz Glauser
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Patent number: 4123272Abstract: A positive-working imaging element is described comprising a support coated first with a negative-working, solvent-developable, photohardenable stratum, then over-coated with a second negative-working, solvent-developable, photohardenable stratum; the second stratum serves as a mask for the first stratum since it contains ingredients which strongly absorb radiation actinic to the first stratum. The second stratum is imagewise exposed, solvent developed, and the resulting actinically opaque image used as a negative in exposing the first stratum, which is solvent developed to remove the composition in unexposed, but not in exposed areas. Optionally, a separating layer can be present between the photohardenable strata and a cover layer can be present over the second stratum. Positive-working low relief images suitable for lithographic printing plates, printed circuit resists, and contact-speed lithographic films are obtained from the elements of this invention.Type: GrantFiled: May 17, 1977Date of Patent: October 31, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: John A. Quinn
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Patent number: 4123252Abstract: Herbicidal cyanoalkanapyrazoles of the formula: ##STR1## where N IS 3, 4, OR 5;Q is --O--CH.sub.3 or --S(O).sub.m --CH.sub.3 ;where m is 0, 1 or 2; andR.sub.1 is hydrogen or methyl;V is hydrogen, fluorine or chlorine;X is fluorine, chlorine, bromine, iodine, cyano or methoxy;Y is hydrogen, fluorine, or chlorine; andZ is hydrogen or fluorine;Provided that:(a) when n is 3, R.sub.1 is hydrogen;(b) when n is 5, R.sub.1 is hydrogen, Y is hydrogen or fluorine, Z and V are hydrogen and X is fluorine, chlorine or bromine and m is 0;(c) when V is fluorine or chlorine, X is fluorine, chlorine or bromine and Z is hydrogen;(d) when m is 1 or 2, Y is fluorine and V and Z are hydrogen.Type: GrantFiled: September 24, 1976Date of Patent: October 31, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Steven J. Goddard
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Patent number: 4123606Abstract: Oversize agglomerates produced during the agglomeration of small granular tetrafluoroethylene polymer particles, are conveyed to an agitation vessel where they are subjected to agitation to convert them to smaller size agglomerates.Type: GrantFiled: September 21, 1977Date of Patent: October 31, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Satish C. Malhotra
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Patent number: 4123208Abstract: An improved apparatus for dry spinning of filaments adapted to minimize the occurrence of oversized filaments during spinning. The apparatus includes a spinning pack positioned in a chamber supplied with heated gas. The spinning pack includes a distribution plate provided with a plurality of radial passages for gas, each passage having an opening at one end located at the periphery of the pack and an opening at the other end located at the bottom of the pack at the center of the extruded filament bundle to distribute heated gas from the outer chamber to the center of the filament bundle.Type: GrantFiled: March 31, 1977Date of Patent: October 31, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventors: Petrus Klaver, Jacob G. Steenhof de Jong
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Patent number: 4123603Abstract: An elastomeric fluoropolymer having improved low temperature properties is provided. The composition contains polymerized units of 57-61 weight % vinylidene fluoride, 27-31 weight % hexafluoropropene, and 10-14 weight % tetrafluoroethylene.Type: GrantFiled: May 31, 1977Date of Patent: October 31, 1978Assignee: E. I. Du Pont de Nemours and CompanyInventor: Clare A. Stewart, Jr.