Abstract: The method of measuring viscosity of a glass body, such as an optical preform related to at least its softening temperature, exploits the scattering effects the body introduces into a substantially monochromatic radiation passing through it; more particularly, the width of the spectral line due to Brillouin scattering is measured. The temperature of the body can also be determined by measuring the width of the line generated by Rayleigh scattering. The method is of particular interest for measurements on glasses.
Type:
Grant
Filed:
November 18, 1987
Date of Patent:
May 16, 1989
Assignee:
Cselt-Centro Studi e Laboratori Telecomunicazioni S.p.A.
Abstract: Flexible, soft objects such as ostomy pouches, wound dressings, bandages, diapers, etc. can be flushed down a conventional toilet by covering the article with a sheet of material which rapidly becomes slimy or exudes a slimy material on contact with the water in a toilet bowl or by adding such materials directly to the bowl.
Abstract: Polymerization of methyl methacrylate with initiator of perester salt of maleic acid is faster and better by providing bisulfite activator in water-in-oil emulsion form.
Abstract: The distributed temperature sensor employs an optical fiber as sensing element located in an ambient or near a body of which the temperature is to be monitored or measured. A source of light pulses sends into the fiber, pulses of predetermined duration. The backscattered radiation is collected for each pulse and the frequency spectrum variations in the backscattered radiation with respect to the incident radiation are analyzed. A computer obtains the temperature from said variations. The source and the spectrum variation analyzer are part of an optical time domain reflectometer which allows the temperature information to be associated with the information on the position of the backscattering point along the fiber.
Type:
Grant
Filed:
November 18, 1987
Date of Patent:
May 16, 1989
Assignee:
CSELT - Centro Studi e Laboratori Telecomunicazioni S.P.A.
Abstract: A method for detecting Corynebacterium kutscheri in biological material using a hybridization probe is disclosed. Preferably, the biological material is from a laboratory animal. A novel C. kutscheri specific DNA probe prepared in a specified manner is also disclosed.
Abstract: A method is provided for preparing a stable liposome precursor in the form of a mixture of spray-dried liposomal components including one or more biologically active compounds which may be stored dry and reconstituted with water to form a liposomal preparation immediately prior to use. The dry liposome precursor is also provided.
Abstract: An apparatus for winding thin films. Boundary air is discharged and the layers are compressed by a flexible, bowed idler roller located between a winding roll and a backup drive roll. High quality rolls free from wrinkles are produced.
Abstract: The guidewire gripping device is usable in connection with guidewires of the type used in medical application, i.e., for guiding catheters. The guidewire gripping device is constructed from a spring loaded, slitted cylindrical body.
Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides in which the aryl radical is substituted in the 2-position by a carboxy radical, ester, thioester, or amide thereof; e.g. N-[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-2-methoxycarbonylbenzenesulf onamide or N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-2-methoxycarbonylbenze nesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.
Abstract: A take apart lightweight hunter's drag apparatus capable of being carried in a compact arrangement on the body of a hunter, for carrying said apparatus in a disassembled compact arrangement on a hunter and for transporting in an assembled arrangement slain animals and other articles through densely wooded areas and for suspending animals during skinning and quartering, comprising a tubular center member, a rope arranged in the shape of a loop and attached at the ends thereof to the center member, a pair of detachable tubular end members axially aligned and detachably retained to the end portions of the center member, and spring means for detachably retaining the outer members to the center member.
Abstract: The present invention relates to novel tricyclo ether derivative compounds, to compositions containing these ether derivative compounds, and to methods of using these compounds or compositions to control the growth of undesired vegetation.
Abstract: A composite film that is particularly useful in protective garments comprises a film layer of polyvinyl or polyvinylidine fluoride or copolymers thereof bonded to a film of polyvinyl alcohol polymer or copolymers thereof.
Abstract: An ostomy device for releasably connecting an ostomy bag to an adhesive backed label including a mounting member for connecting one of two coupling parts to the label. The mounting member comprises an expandable portion for facilitating displacement of the connected coupling part between a normal position and an expanded position. The expanded portion comprises a pair of accordion-like folds including an inner fold and a smaller outer fold. The connected coupling part comprises a rib portion having a deflectible sealing strip extending therefrom. The rib portion is connected to the mounting member adjacent the outer folds such that the sealing strip is positioned intermediate the inner and outer folds when the coupling part is in the normal position. The inner fold guides discharge from the stoma into the bag and away from the interengaged coupling parts. In an alternate embodiment, the mounting member is affixed to the label.
Abstract: A holder for receiving cards with electronically stored data or printed circuit boards. The holder has guide means to receive the card. The holder is provided with a connector with contact springs for contacting connection strips located on the card. One end of each contact spring is clamped while the other is free to move and make contact with the connection strips. The contact springs include the parts formed by bending and shaped so as to minimize pressure and friction against the connection strips of the card.
Type:
Grant
Filed:
September 13, 1988
Date of Patent:
May 2, 1989
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
Laurentius M. Verhoeven, Cornelis G. J. Van Nes
Abstract: An improvement process for the preparation of copper-containing methanol dissociation catalysts by precipitation of a copper-containing catalyst precursor, calcination, and reduction of the precursor, the improvement comprising conducting the calcination of the precursor in an atmosphere of CO.sub.2.
Abstract: Polyethylene terephthalate scrap material containing on its surface a chlorine-containing polymer such as, for example, polyvinylidene chloride or polyvinyl chloride, can be recovered and reused by melt-blending it with a polymer from a defined class of ethylene copolymers containing an epoxy group, and melt processing the blend in the same manner as virgin polyethylene terephthalate. The recovered and reprocessed polymer material has good physical properties and barrier properties.
Type:
Grant
Filed:
December 30, 1986
Date of Patent:
May 2, 1989
Assignee:
E. I. DuPont de Nemours and Company
Inventors:
Vinodkumar Mehra, Pallatheri M. Subramanian
Abstract: This invention relates to a hand held, totally integrated dispenser for mixing and dispensing two viscous components. The dispenser includes a hollow plunger within a generally cylindrical outer chamber. The hollow plunger has an open ended container attached to its proximal end. The hollow plunger is used to mix the two viscous components and as a dispensing nozzle.
Abstract: A low smoke generating, high char forming, substantially nondripping flame resistant thermoplastic multi-block copolyester wherein the weight ratio of high melting point blocks to low melting point blocks is from about 8:1 to 1:4, and said copolyester has a melting point below about 175.degree. C., said copolyester composition containing a bromine containing flame retardant; antimony trioxide; a drip suppressant for the multi-block copolyester, 25-65 parts per 100 parts multi-block copolyester of 50-88% alumina trihydrate and 12-50% of a magnesium compound selected from the group consisting of magnesium carbonate, magnesium oxide, and particulate magnesium hydroxide and, optionally, containing calcium carbonate and, preferably, containing a coupling agent having a hydrolyzable moiety containing titanium or silicon and an organophilic group.
Abstract: The crystalline delta(.delta.)-form of [3S-[3.alpha.(Z),-4.beta.]]-3-[[(2-amino-4-thiazolyl) [(1-carboxy-1-methylethoxy)imino]acetyl]amino]-4-methyl-2-oxo-1-azetidines ulfonic acid is prepared.