Patents Assigned to I
  • Patent number: 4132324
    Abstract: A stabilizer assembly for a construction vehicle having at least one stabilizer arm which can be pivoted laterally inwardly of the fixed pivot point of an associated fluid cylinder power unit. Preferably the stabilizer arm has a pair of spaced stabilizer arm members which define a passageway therebetween for passage of a single fluid ram during pivoting of the stabilizer arm.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: January 2, 1979
    Assignee: J. I. Case Company
    Inventor: Elton B. Long
  • Patent number: 4132729
    Abstract: Process for removing water from a solution of water in 2-amino-2,4-dimethyl-4-methoxy pentanenitrile comprising treating said pentanenitrile solution with sufficient ammonia to form an ammonia concentration in the ammonia-water composition of at least 18% by weight at from 0.degree. to 50.degree. C, to cause an aqueous layer and a pentanenitrile layer to form, separating the pentanenitrile layer and the aqueous layer and then optionally removing ammonia from the pentanenitrile layer and optionally reacting the pentanenitrile with substantially no ammonia in the presence of a metal hypochlorite and a surfactant to prepare 2,2'-azobis(2,4-dimethyl-4-methoxy pentanenitrile).
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: January 2, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Earl P. Moore, Jr.
  • Patent number: 4132845
    Abstract: A method is provided for isolating an elastomer from a mixture of the elastomer and water containing up to about 90% by weight water by feeding the mixture into a thermally controlled, vertical separator containing a rotating screw, simultaneously feeding excess water under pressure into the separator, withdrawing concentrated elastomer containing less than about 10% by weight total volatiles (including water) from the metering section of the separator and withdrawing feed water and excess water from a water discharge port located near the upper end of the separator.In addition, apparatus for isolating elastomers from mixtures of elastomers and water is provided.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: January 2, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Covington, Jr., Okan M. Ekiner
  • Patent number: 4131581
    Abstract: Adhesives consisting essentially of polyvinyl alcohol or ethylene/vinyl alcohol copolymer, a crystalline solvent for the polymer component (such as urea, thiourea, acetamide, ammonium formate, etc.) and a viscosity reducing diluent (such as water, glycols, etc.) are disclosed. The adhesives are particularly suitable for cellulosic substrates and provide excellent ambient temperature water resistance while being fully repulpable in hot water.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James N. Coker
  • Patent number: 4131467
    Abstract: Compounds of the general formula ##STR1## wherein A and B are hydroxy radicals in the 4,7 or 5,6 positions and X.sup.- represents Br.sup.-, Cl.sup.- or I.sup.- are incorporated into light-sensitive silver halide emulsions to improve their sensitometric characteristics. In general, these compounds act as antifoggants by restraining fog growth but at the same time act as development accelerators by increasing gradient and Dmax, usually at some speed loss.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John H. Bigelow
  • Patent number: 4131740
    Abstract: Alkyl perfluoro-.omega.-fluoroformyl esters are provided which have the formula: ##STR1## wherein R is alkyl of 1-6 carbon atoms, and n is 0-6 (preferably 0). Compounds where n is 0 are prepared by contacting SO.sub.3 with a compound of the formula ROOC--CF.sub.2 --CF.sub.2 --OR.sup.1. Compounds where n is 1-6 are prepared by contacting a compound where n is 0 with hexafluoropropylene oxide.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David C. England
  • Patent number: 4131712
    Abstract: A process for making a high molecular weight polyamide, wherein a diacid-rich component and a diamine-rich component are prepared separately in nonstoichiometric proportions, each of these components melting below the melting temperature of the polyamide product, and preferably below 200.degree. C; and then the diacid-rich component and the diamine-rich component are contacted in liquid state at high enough temperature to prevent solidification, and in proportions such that the total amounts of diacid and diamine, whether combined or not, are as much as possible stoichiometric. A major utility of this process is in the production of Nylon 66, a known fiber-forming polyamide and engineering plastic.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jerome W. Sprauer
  • Patent number: 4131542
    Abstract: A process for preparing a low-cost silica packing for chromatography is disclosed. The process involves spray-drying an aqueous silica sol containing from 5 to 60 weight percent silica, to form porous micrograins having a dense packing, acid-washing the porous micrograins, and sintering to effect a 5 to 20% loss in surface area.
    Type: Grant
    Filed: July 19, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Horacio E. Bergna, Joseph J. Kirkland
  • Patent number: 4131294
    Abstract: A trailer attachment for a tree harvester is disclosed herein. The trailer attachment consists of a main frame having a grapple frame supported thereon through a support frame and the support frame is rotated about a vertical axis on the main frame while the grapple frame is supported for pivotal movement about a horizontal axis on the support frame. First and second biasing means are interposed respectively between the main frame and support frame and the support frame and grapple frame so that the grapple frame is returned to a predetermined position wherein an upper support surface extends generally horizontally and the horizontal pivot axis extends generally parallel to the main axle for the trailer.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: December 26, 1978
    Assignee: J. I. Case Company
    Inventors: Robert G. Johnson, Earl D. Drefcinski
  • Patent number: 4131616
    Abstract: An improved nickel chromite catalyst useful for methanation is prepared by pre-reducing the hexavalent chromium component thereof to trivalent form, while maintaining the nickel component in unreduced oxide form.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Alvin B. Stiles
  • Patent number: 4131646
    Abstract: In a process for the manufacture of hydrogen peroxide wherein a compound containing the anthracene nucleus is hydrogenated to the corresponding 9,10-dihydroanthracene and the resulting 9,10-dihydroanthracene is oxidized to the corresponding 9-(or 10-) hydroperoxide; the step which comprises contacting the hydroperoxide thus produced with an acid catalyst to produce hydrogen peroxide and the starting compound containing the anthracene nucleus.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lawrence W. Gosser
  • Patent number: 4131371
    Abstract: This invention relates to a screw processor having multiple fully intermeshed co-rotating in-phase screws each provided with equal numbers of threads, each of said screws having longitudinally staged eccentric cross-sections preselected so that at least one thread of each screw spreads process material over the barrel bore and at least one other thread of each screw collects said process material and transfers it to a co-acting screw, which thereupon repeats the spreading-collecting-transfer cycle.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Daniel G. Tynan
  • Patent number: 4131184
    Abstract: A vehicle drive transmission comprising an air released main clutch connected between a torque convertor and multiple ratio gear transmisson. A lock up clutch for the convertor turbine and impeller is engaged by hydraulic pressure when an engine drive governor reaches a predetermined speed and opens a governor valve. The main clutch is released by a motor controlled by a solenoid valve which selectively connects the motor to a source of air pressure or to atmosphere via a restricted orifice and a normally closed air inlet valve. The restriction retards the engagement of the main clutch when the engine is rotating below the predetermined speed, and above said predetermined speed, the governor valve opens to engage the lock-up clutch and to open the air inlet valve whereby the main clutch may be engaged at a faster rate.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: December 26, 1978
    Assignees: Tsentralny Nauchno Issledovatelsky Avtomobilny i Avtomotorny Institut Nami, Proizvodstvennoe Obiedinenie "Baz"
    Inventors: Leonid A. Rumyantsev, Jury K. Esenovsky-Lashkov, Vasily T. Avershin, Vladimir Y. Ilnitsky, Ivan L. Jurin
  • Patent number: 4131217
    Abstract: A device for emptying a container of the type comprising two domed parts of different stiffnesses sealed along a joint and having an outwardly directed flange adjacent the joint. A holder for the container has an opening and a member defining a gap to position and receive most of the container flange. The opening and the gap defining member are so arranged that when the flange is inserted in the gap, the outlet of the container is located substantially in line with the holder opening. An emptying member is provided opposite the holder opening and is manually displaceable in the direction thereof for emptying the container. In one embodiment, the holder is the cylinder of a piston and cylinder arrangement, the piston of which forms the emptying member while in another embodiment, the holder is in the form of an annular structure, one part of the wall of which has enhanced flexibility so as to form the emptying member.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: December 26, 1978
    Assignee: Landstingens Inkopscentral, L I C
    Inventor: Owe Sandegren
  • Patent number: 4131571
    Abstract: A coating composition containing(1) an acrylic polymer having pendent hydroxyl containing ester groups;(2) cellulose acetate buryrate,(3) an alkyl acid phosphate,(4) a metallic flake pigment such as aluminum flake and, optionally other pigments,(5) an ultraviolet light absorbing agent(6) an organo metal catalyst, and(7) an organic polyisocyanate;The composition forms an excellent finish for the exterior of automobiles and trucks since the finish is glossy, durable and weatherable and has excellent metallic glamour.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: December 26, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Keenan L. Crawley, Lester I. Miller
  • Patent number: 4130480
    Abstract: An apparatus for the sorting, counting and grouping of successively conveyed items includes a conveyor arrangement defining a conveying path; at least one sorting device disposed along the conveying path for removing defective items; a counting device disposed along the conveying path downstream of the sorting device for counting the items unaffected by the sorting device; at least two branch conveyors forming the conveying path downstream of the counting device; a routing device arranged along the conveying path upstream of the branch conveyors and actuated by the counting device for directing a predetermined number of items into selected branch conveyors; a stacking device disposed at the downstream end of the branch conveyors for stacking the items to form item groups each consisting of the predetermined number of items; and a collecting conveyor forming the conveying path downstream of the stacking device for further advancing the item groups.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: December 19, 1978
    Assignee: S I G Schweizerische Industrie-Gesellschaft
    Inventor: Horst Loewenthal
  • Patent number: 4130706
    Abstract: A contact lens which when saturated with water has oxygen permeability of greater than 500 centibarrers and a receding contact angle with water of less than 35.degree.. The lens is formed of a polymer containing from 20 to 80 weight percent of repeating units of the structure ##STR1## where --R is --H or CH.sub.3 and R.sub.1 contains from 2 to 10 carbon atoms and at least one polar group. In a preferred aspect --R.sub.1 is --CH.sub.2 CH.sub.2 OH or --CH.sub.2 CHOHCH.sub.3. The polymer also contains from 80 to 20 weight percent of repeating units of the structure ##STR2## where --R.sub.2 is --H or --CH.sub.3 and n is 1 to 4.
    Type: Grant
    Filed: August 8, 1977
    Date of Patent: December 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Louis Plambeck, Jr.
  • Patent number: 4130715
    Abstract: Polycyclic trisaminomethanes of the formula ##STR1## in which R.sup.1 and R.sup.2, alike or different, are alkylene;R.sup.3 and R.sup.4, alike or different, are alkyl, cycloalkyl, or aralkyl; or R.sup.3 and R.sup.4 are joined together to form an alkylene group which may be interrupted by(1) a ##STR2## group where Q is hydrogen or alkyl, or (2) ONE OR TWO --O-- linkages; andThere are at least 2 carbons between each two hetero atoms in the outer ring system,Are useful as initiators for the polymerization of pivalolactone. These polycyclic trisaminomethanes are prepared by reacting a polyamine of the formulaR.sup.3 NHR.sup.1 NHR.sup.2 NHR.sup.4with a dialkoxy(dialkylamino)methane of the formula(RO).sub.2 CHNR.sub.2 'in which R and R', alike or different, are alkyl.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: December 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas J. Atkins
  • Patent number: 4130579
    Abstract: Aromatic-aliphatic dinitriles of the formula ##STR1## in which Ar is an arylene or substituted arylene are useful in the preparation of the corresponding amines which are intermediates for the preparation of thermally stable, rigid, polyamides.
    Type: Grant
    Filed: June 8, 1977
    Date of Patent: December 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: August H. Frazer, John F. Harris, Jr., Elmore L. Martin
  • Patent number: 4130528
    Abstract: Neoprene compositions containing a latex of a copolymer of chloroprene with an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, such as methacrylic or acrylic acid, the polymerization being conducted in the presence of polyvinyl alcohol, and zinc oxide or zinc hydroxide which has been previously contacted with an alkali metal hydroxide are particularly well suited for use in contact adhesives.
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: December 19, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Mark C. Chen