Patents Assigned to E
  • Herbicidal sulfonamides
    Patent number: 4801327
    Abstract: The invention relates to certain sulfonylurea compounds having a carbocyclic or heterocyclic ring ortho to the sulfonylurea linkage, compositions thereof and a method of their use as herbicides or plant growth regulants.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: January 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joel R. Christensen, Morris P. Rorer
  • High tenacity polyhexamethylene adipamide yarn having ribbon cross-section filaments
    Patent number: 4801503
    Abstract: A polyhexamethylene adipamide yarn characterized by a tenacity greater than 4.5 g/den., an elongation of from 25-40% constituent ribbon cross-section filaments having a length to width ratio greater than 3 is disclosed. Also disclosed is the process for making such yarn including a delayed quench and a two-stage hot chest draw.
    Type: Grant
    Filed: May 5, 1987
    Date of Patent: January 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Uel D. Jennings
  • Linear travel windup
    Patent number: 4801104
    Abstract: A modified windup in which package supports move in a linear motion as packages build on chucks in surface-driven engagement with drive roll. Fluid cylinders moving the chucks are connected via a hydraulic loop permitting free flow of fluid between the cylinders as yarn packages are wound thereby utilizing counter-balancing package weights for controlling force between the chucks and the drive roll.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: January 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Rufus E. Buck
  • Aminomethyl oxooxazolidinyl cycloalkylbenzene derivatives useful as antibacterial agents
    Patent number: 4801600
    Abstract: Aminomethyl oxooxazolidinyl cycloalkylbenzene derivatives, such as l-N-[3-(2,3-dihydro-1-oxo-1H-inden-5-yl)-2-oxooxazolidin-5-ylmethyl]acetam ide, possess useful antibacterial activity.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: January 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Chia-Lin J. Wang, Mark A. Wuonola
  • Thermoplastic elastomeric compositions
    Patent number: 4801647
    Abstract: A thermoplastic elastomeric composition comprising a dynamically crosslinked grafted polyolefin copolymer elastomer and a thermoplastic crystalline polyolefin is disclosed. The crosslinked elastomer is dispersed in the thermoplastic crystalline polyolefin which is present as the continuous phase. The grafted elastomer is ethylene/propylene/diene terpolymer or ethylene/propylene copolymer grafted with fumaric acid, maleic acid, maleic anhydride or derivatives thereof capable of reacting with diamine crosslinking agents.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: January 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James R. Wolfe, Jr.
  • Recovery of silver from photographic film with high shear and caustic
    Patent number: 4799954
    Abstract: A process for the recovery of silver from exposed or unexposed photographic film using a caustic alkali solution at elevated temperatures with high shear.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jerome Hochberg
  • Cable having a corrugated septum
    Patent number: 4800236
    Abstract: A cable structure in round or flat form is characterized by a corrugated septum disposed intermediate an inner and an outer sheath. The septum contacts the sheaths to define tubular envelopes extending axially along the length of the cable. Each of the envelopes is able to receive a predetermined number of conductors. The sheaths and the septum are electrically connectable to a ground potential so as to totally electromagnetically isolate the conductors entirely along their axial lengths.
    Type: Grant
    Filed: July 8, 1987
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Timothy A. Lemke
  • Rotary developer and method for its use
    Patent number: 4799993
    Abstract: A rotary developer for removing unhardened portions of a layer of an electronic part to form vias in the part. The developer orbits the layer about the axis in one direction while rotating the layer in an opposite direction eliminating leading and trailing edge effects on vias.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Edward F. Hagan
  • Multi-layer plastic container
    Patent number: 4800129
    Abstract: Thermoformed multi-layer structures comprising at least a first and a second layer, the first layer comprising a blend of amorphous polyamides having a Tg greater than about 120.degree. C. and one or more semicrystalline aliphatic polyamide and the second layer comprising a structural thermoplastic resin.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gedeon I. Deak
  • Polylactide compositions
    Patent number: 4800219
    Abstract: Novel polylactide composition containing segments or poly(R-lactide) interlocked with segments of poly(S-lactide).
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph R. Murdoch, Gary L. Loomis
  • Computer key and computer lock system
    Patent number: 4800590
    Abstract: A computer access system includes a password generator (10) and an lock computer (50) connected to receive passwords generated by the password generator and grant access to a host computer (52) when a password from the password generator (10) matches a password separately generated by the lock computer (50). The password generator (10) and the lock computer (50) have corresponding pseudo-random number sequences stored in memories (26 and 90). The password generator (10) and the lock computer (50) have synchronized clocks (30 and 84), which define time intervals. During a given time interval, entry of a personal identification number in password generator (10) will cause the password generator (10) to generate a unique password from the random number sequence in memory (26) and time interval information from clock (30).
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: January 24, 1989
    Assignee: Willis E. Higgins
    Inventor: James C. Vaughan
  • Wetness detection system
    Patent number: 4800370
    Abstract: A wetness detection system for detecting dampness in diapers or other articles of clothing includes a detector/transmitter which is attachable to the diaper or clothing. The detector/transmitter produces and transmits a signal when no urine or other conductive matter is present in the diaper or clothing, and this signal is received by and retransmitted from a retransmitting station which may, for example, be located on the bed of the person wearing the diaper or clothing. The retransmitted signal is ultimately received at a central station for alerting an attendant when a wetness condition is detected. Since signals are transmitted when no urine is present, the absence of signals over some predetermined period of time indicates that wetness is present.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: January 24, 1989
    Assignee: I E Sensors, Inc.
    Inventor: Ivan Vetecnik
  • Method for fabricating multilayer circuits
    Patent number: 4799984
    Abstract: The invention is directed to a method for fabricating multilayer circuits on rigid ceramic substrates using conventional dielectric green tape and thick film conductive pastes in which the number of firing steps is substantially reduced while maintaining excellent X-Y dimensional stability.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Joseph R. Rellick
  • Fixed-bed hydrogen peroxide catalyst
    Patent number: 4800075
    Abstract: An improved fixed-bed cyclic anthraquinone process for production of hydrogen peroxide wherein the improvement is using a hydrogenation catalyst comprising palladium or a mixture of palladium and platinum on a support containing alpha alumina. The preferred range of palladium is 0.1 to 3 weight percent and the preferred range of platinum, when present, is greater than 0.01 weight percent (based on the total weight of the catalyst). The preferred catalyst support contains greater than 5 percent alpha alumina.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: January 24, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Colie L. Jenkins
  • Selective method-of-use of oxabicycloalkanes
    Patent number: 4798621
    Abstract: This invention relates to a method for controlling the growth of undesired vegetation in paddy rice crops by applying an effective amount of an oxabicycloalkane herbicidal compound to the locus of paddy rice.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: January 17, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert C. Ackerson, Takeshi Yuyama
  • Bacterial hydroxylation of codeine
    Patent number: 4798792
    Abstract: A microbial process for converting codeine to 14-hydroxycodeine is provided. This process comprises aerobically culturing codeine with bacteria of the genus Streptomyces for at least about 3 days in a rich medium such as soybean flour medium.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: January 17, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Patricia A. Harder, Daniel A. Kunz
  • Preparation of microencapsulated pigment
    Patent number: 4798741
    Abstract: Pigment particles of a suitable size are microencapsulated by mixing them in a gelatin solution, coacervating the gelatin to coat them, cooling to set the gelatin, adding formaldehyde to harden the particles, sequestering unreacted formaldehyde with a bisulfite, adding gelatin to coat the hardened particles, precipitating the particles chemically or physically, and washing the precipitate.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: January 17, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jeffrey W. Nelson
  • Certain [(lower alkanoyl-thio)methyl-1-oxo-3-phenyl propyl amino]benzene lower alkanoic acid or ester derivatives which inhibit enkephalinase
    Patent number: 4798904
    Abstract: Acylmercaptoalkanoyl compounds of the formula ##STR1## wherein n is an integer from one to fifteen possess enkephalinase inhibition activity and are useful as analgesic agents.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: January 17, 1989
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Norma G. Delaney, Eric M. Gordon, Miguel A. Ondetti
  • 2-hydroxypropylamine heteroaryl ester derivatives
    Patent number: 4798892
    Abstract: The present invention relates to compounds of the general formula ##STR1## wherein Ar represents a substituted or unsubstituted 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 alike 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. The compounds exhibit beta-adrenergic blocking activity and are also useful in the treatment of glaucoma.
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: January 17, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Sheung T. Kam, William L. Matier, Ghanshyam Patil, Khuong H. X. Mai
  • Zirconium chelates and their use for cross-linking
    Patent number: 4798902
    Abstract: A water-soluble zirconium chelate formed from a tetraalkyl zirconate and hydroxyethyl-tris-(hydroxypropyl) ethylene diamine, and use of the chelate as cross-linking agents in hydraulic fracturing fluids and in gels that are used for selectively plugging permeable zones in subterranean formations or for plugging subterranean leaks.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: January 17, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Donald E. Putzig