Patents Assigned to E
  • Life silver recovery system
    Patent number: 4881973
    Abstract: A process is described which improves the life of a silver recovery unit which employs finely divided iron and a minor amounts of a copper or cadmium salt therein by raising the pH of waste acidic photographic processing stream containing silver to be recovered. This pH increase may be accomplished using waste developer stream. An additional use of a chelating agent has been found to be beneficial.
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: November 21, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James E. Williams
  • Electrical terminator device
    Patent number: 4881902
    Abstract: A compact electrical terminator device is provided. The device has a circuit board mounted parallel to the mating face of the device between two housings. The resistive or other impedance elements are mounted on the side of the circuit board away from the mating face and are covered by a ventilated housing. The terminals of the device project directly from the circuit board in the other direction, passing through terminal channels in the other housing.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: November 21, 1989
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ralph A. Papa, James R. Koser
  • Infrared laser recording film
    Patent number: 4882265
    Abstract: A photographic element useful as a laser medical recording film, for example, is described. This element has near infrared sensitivity and is characterized by having an absorbing layer with an absorbing dye as described herein present as an antihalation backing layer.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: November 21, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Evan D. Laganis, Alden D. West
  • Heterocyclic 2,3-dihydrobenzofuran herbicides
    Patent number: 4881967
    Abstract: This invention pertains to novel heterocyclic 2,3-dihydrobenzofuran and chromane compounds, including stereoisomers, agriculturally suitable composition containing them, and their use as broad spectrum herbicides.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: November 21, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Joseph E. Semple
  • Polyimide gas separation membranes
    Patent number: 4880442
    Abstract: Aromatic polyimide gas separation membranes containing the repeating unit: ##STR1## where --Ar-- =is ##STR2## or mixtures thereof, ##STR3## or mixtures thereof Where --X, X.sub.1, X.sub.2, and X.sub.3 are independently primary or secondary alkyl groups having 1 to 6 carbon atoms preferably methyl or ethyl, --Z is --H, --X, --X.sub.1, --X.sub.2, or --X.sub.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: November 14, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard A. Hayes
  • Penile clamp
    Patent number: 4880016
    Abstract: A penile clamp has a flexible member for encircling the shaft of the penis. It can be tightened around the penis. The arrangement and construction of the flexible member is such that such tightening causes a localized pressure to be applied to a central portion of the underside of the penile shaft.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: November 14, 1989
    Assignee: E. R. Squibb and Sons, Inc.
    Inventors: Peter H. L. Worth, Ann Eaton, Peter L. Steer
  • Angiotensin II receptor blocking benzimidazoles
    Patent number: 4880804
    Abstract: Substituted benzimidazoles such as ##STR1## and pharmaceutically suitable salts thereof are useful as angiotensin II blockers. These compounds have activity in treating hypertension and congestive heart failure.
    Type: Grant
    Filed: January 7, 1988
    Date of Patent: November 14, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: David J. Carini, John Jonas V. Duncia, Sung-Eun Yoo
  • Apparatus for heating yarn
    Patent number: 4880961
    Abstract: A yarn heating element wherein fixed elongated core having a heater therein serves as a support for a sleeve rotatably mounted to and telescoped over the core. The space between the core and sleeve can be varied along their lengths for controlling heat radiated from the core to the shell to control the temperature profile along the length of the shell. Varying the winding density of the heater can serve the same purpose.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: November 14, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James E. Duncan
  • Modified polytetrafluoroethylene resins
    Patent number: 4879362
    Abstract: New modified non-melt-fabricable polytetrafluoroethylene resins have now been found which can be compounded with elastomers or plastics without the deleterious agglomeration or fibrillation that occurs with known modified non-melt-fabricable polytetrafluoroethylene resins. The resins are made of recurring units of tetrafluoroethylene, and recurring units of at least one comonomer selected from hexafluoropropylene or perfluoro (alkyl vinyl ether) wherein the alkyl group is of 1-4 carbon atoms, said comonomer present in amounts sufficient to produce the effect recited in the first sentence.
    Type: Grant
    Filed: December 31, 1987
    Date of Patent: November 7, 1989
    Assignee: E. I. DuPont De Nemours and Company
    Inventor: Richard A. Morgan
  • Manufacture of high purity hydrogen peroxide by using reverse osmosis osmosis
    Patent number: 4879043
    Abstract: A reverse osmosis process for manufacturing highly-pure aqueous hydrogen peroxide. Membranes used are aromatic polyamides, polypiperazineamides, polysulfones or polyacrylonitriles.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John H. Boughton, Ralph A. Butz, Herman C. T. Cheng, Jonathan R. Dennis, Brian T. Hannon, Janet H. Weigel
  • Apparatus and process for intermingling filament yarns
    Patent number: 4878280
    Abstract: This invention relates to an apparatus and a process involving fluid jet devices for intermingling filaments of a continuous filament yarn or yarns, including combining a plurality of yarns to produce a larger coherent yarn. More particularly, the invention relates to fluid jets having a passageway through which yarn moves, where the yarn is positioned and maintained along one wall as it passes through the passageway and where the fluid-directing orifice in the jet is offset with respect to the passageway in the direction of the wall. The apparatus and the process are useful in producing heather yarns with superior yarn blending and along-end uniformity.
    Type: Grant
    Filed: August 2, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Thomas L. Nelson, Lynn B. Thomas, Sr.
  • Quilted elastic composite fabric
    Patent number: 4879169
    Abstract: An elastic quilted composite fabric is provided. The quilted fabric has at least one gathered fibrous layer and at least one elastic fabric layer. The elastic fabric layer preferably includes 1/2 to 10% by weight of spandex fibers and is a stitch-bonded fabric whose elastic characteristics are not activated until after the various layers of the composite fabric have been quilted together.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dimitri P. Zafiroglu
  • Differentiation of nucleic acid segments on the basis of nucleotide differences
    Patent number: 4879214
    Abstract: A process for distinguishing nucleic acid segments on the basis of nucleotide differences, thereby providing a rapid, convenient means for detecting mutation, is disclosed. The present process comprises synthesizing separately complementary nucleic acid strands on each of at least two target nucleic acid templates using a nucleic acid polymerase and nucleoside triphosphate substrates, wherein at least one of the natural nucleoside triphosphate substrates is replaced with a mobility-shifting analog; denaturing the synthesized strands from the templates if necessary; and comparing the mobility of the separately synthesized strands through a size-fractionation medium. A difference in mobility indicates that the target nucleic acid templates contain different numbers of total nucleotides and/or different numbers of nucleotides complementary to the mobility-shifting analogs.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John S. Kornher, Kenneth J. Livak
  • Device for encouraging children to brush their teeth regularly
    Patent number: 4878845
    Abstract: A device for aiding and encouraging a child to brush his or her teeth regularly. The device is provided with a pair of nonrotatable shafts each of which mounts seven rotatable blocks shaped like a molar tooth, each block representing either the morning or night of a particularly day during which a child should brush his teeth. The front surface faces of the blocks form a frowning mouth with dirty teeth, while the rear surface faces form a pattern of a smiling mouth with white teeth after all of the blocks have been rotated 180 degrees. Each block is rotated to expose a portion of the smile and to remove a portion of the frown after each tooth brushing in the morning and evening of each day.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: November 7, 1989
    Assignee: Tom E. Lindsay
    Inventors: Tom E. Lindsay, James C. Smith
  • Herbicidal Sulfonamides
    Patent number: 4878938
    Abstract: This invention relates to novel herbicidally active sulfonylurea compounds substituted in the positions ortho to the sulfonylurea bridge, agriculturally suitable compositions thereof and methods of their use as preemergent or postemergent herbicides or plant growth regulants.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Mary A. Hanagan
  • Herbicidal sulfonamides
    Patent number: 4878937
    Abstract: This invention relates to herbicidally active sulfonylurea compounds, agriculturally suitable compositions thereof and their method of use as herbicides or plant growth regulants.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Donald J. Dumas, Marcus P. Moon
  • Low Dielectric constant compositions
    Patent number: 4879261
    Abstract: An alkali-free composition for making a ceramic dielectric body having a dielectric constant less than 5.0, which is a mixture of finely divided particles consisting essentially of 70-85% wt. silica and 15-30% wt. zinc borate flux. This composition can be used to make green tape and multilayer devices having internal copper conductors such as multilayer capacitors and multilayer interconnects.
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: November 7, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ian Burn
  • Chair/lounge
    Patent number: D304394
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: November 7, 1989
    Assignee: W. E. Harmer Associates Pty. Ltd.
    Inventor: Warren E. Harmer
  • Grille cap for a vehicle
    Patent number: D304437
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: November 7, 1989
    Assignee: E&G Classics, Inc.
    Inventor: David D. Eash
  • Bottle
    Patent number: D304681
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: November 21, 1989
    Assignee: S. & E. & A. Metaxa International S.A.
    Inventor: Spyros Metaxa