Abstract: A floatable on water, translucent laminated plastic sheet material having a plastic embossed film with a plurality of embossments dispersed thereon except at the longitudinal edges thereof. The embossments are spaced apart and separated by land areas and a plastic backing film is laminated to the embossed film at the said longitudinal edges and at the land areas. Thus air containing buoyant cells are formed by the embossments of the embossed film and the backing film. The improvement comprise a fibrous material laminated to the sheet material at least at the longitudinal edges thereof, whereby the edges are reinforced by the fibrous material and the edges may be attached to correspondingly reinforced edges of another of the sheet material without substantially weakening the attached sheets of material at the attachments thereof.

Abstract: A film construction is disclosed which comprises a base layer of biaxially oriented polypropylene, a top layer of a copolymer of ethylene and an unsaturated carboxylic acid, and a bottom layer selected from the group consisting of copolymers of ethylene and an unsaturated acid, copolymers of ethylene and propylene, copolymers of ethylene and vinyl acetate, and ionomers of ethylene and methacrylic acid.

Abstract: The wear resistance and toughness of a coated ceramic insert comprising a ceramic substrate and at least one thin surface layer of ceramic oxide is improved by applying at least one thin intermediate layer of hard borides of the subgroups or of the III-V groups of the periodic table, or of hard yttrium compounds. The layers are deposited from a gaseous phase.

Abstract: Novel cardiovascular prosthetic devices or implants having many useful cardiovascular applications comprise a porous surface and a network of interconnected interstitial pores below the surface in fluid flow communication with the surface pores. Tissue forms a smooth thin adherent coating of self-determining thickness on the porous surface making it resistant to the formation of the blood clots normally associated with the presence of foreign bodies in the blood stream. The device has particular utility in heart valves, pacemaker electrodes, blood pumps, blood stream filters, an artificial pancreas, vascular access tubes, small and large bore vascular grafts, blood pump diaphragms and vascular and intracardiac patches.

Abstract: A highly absorbent sheet or pad sized to and placed onto the top of an operating table is weakened longitudinally through the center to form paired separable center-joined sections for lateral removal to respective sides of a patient lying on the sheet and centered longitudinally therewith. After surgery, the absorbent pad carrying a significant mass of blood can be quickly removed from the patient by pulling with sufficient force on the opposites sides of the pad, severing the pad centrally at the weakened portion. The weight of the patient tends to maintain one section of the pad beneath that portion of the patient as the other section is torn laterally away from the one section. The pad may comprise several layers with one or more layers being weakened by thinning the sheet material or perforating the same longitudinally.

Abstract: A heat wave shielding lamination having improved abrasion resistance is composed of a visible light transparent substrate and an overlying composite lamination in which layers of a visible light transparent substance of a low refractive index and layers of a visible light transparent substance of a high refractive index are alternately arranged on each other, with the topmost layer being a low-refractance layer, and interfacial layers of Al.sub.2 O.sub.3 which are much thinner than the high-refractance and low-refractance layers are provided between the high-refractance and low-refractance layers.

Abstract: High strength, fracture tough, high temperature oxidatively stable, gas turbine engine core engine components are described made of silicon carbide fiber reinforced ceramic matrix or silicon carbide fiber reinforced glass matrix material. A gas turbine engine containing core engine components as above described is also disclosed.

Abstract: A microscope slide having a raised marking surface formed of pigmented resinous material, such as an epoxy resin, which dries to a matte finish which is absorptive and retentive of marking ink.

Abstract: A single crystal film of a hexagonal ferrite is deposited on a nonmagnetic, single crystal substrate with a film of a second ferrite material interposed between the substrate and the hexagonal ferrite film. In a preferred embodiment, the substrate is of nonmagnetic spinel and the second ferrite material is a spinel ferrite.

Abstract: The multi-layer ceramic substrate of this invention includes conductor layers and insulating layers disposed between the conductor layers. The insulating layers include the layers of a sintered body principally composed of mullite and the layers of a sintered body principally composed of alumina. This multi-layer ceramic substrate is produced by laminating the green sheets and sintering the laminate. The green sheets principally composed of mullite and the green sheet principally composed of alumina are prepared, and they are laminated and sintered.

Abstract: The present invention is a circuit board having a substrate comprising a semi-IPN and at least one balanced polyaramid layer.

Abstract: A composite laminated, non-distortable needlepoint canvas material comprised of a primary layer of non-elastic, open-mesh woven fabric having a uniform weave pattern of mesh apertures and a relatively thin secondary mesh-stabilizing layer of sheer non-elastic fabric material. The threads of the open-mesh primary layer are impregnated and coated with a synthetic resin mesh-stiffening material and are bonded to the sheer secondary layer by the synthetic resin mesh-stiffening material of the primary layer or by a combination of such mesh-stiffening material and an applied synthetic adhesive. The threads of the primary layer are not susceptible to raveling at the edges of the composite needlepoint material. The sheer fabric secondary layer may be a non-woven, semi-transparent, random-spun synthetic fiber material or a sheer closely woven fabric material.

Abstract: A fiber material for reinforcing plastics prepared by laminating at least one first fiber substrate in which the reinforcing fibers extend in two directions including the longitudinal direction and the transverse direction intersecting therewith at a substantially right angle with at least one second fiber substrate in which the reinforcing fibers extend in two directions including directions having angles of .+-.(25-65) degree relative to the longitudinal direction.

Abstract: A glass sheet is provided with a coating which will automatically reflect infrared radiation if the ambient temperature is above about 45.degree. F.-60.degree. F. and will transmit infrared radiation if it is below about 45.degree. F.-60.degree. F. Such a coating is placed on the exterior surface of the glass. Additionally, the interior of the glass may be provided with a controllable infrared transmittable or reflective layer of material which is activated by means of an electric current transmitted therethrough and which will reflect infrared energy if so energized, but otherwise will transmit such infrared energy. This layer of material is preferably placed on the interior of the glass surface and activated during the nighttime period so that infrared energy is not transmitted outwardly. Alternatively, the controllable infrared transmittable or reflective layer of material may be positioned both on the exterior and interior of the glass surface.

Abstract: A non-photosensitive transfer resist sheet material comprises in sequence(a) a carrier support(b) a release layer(c) a flexible, water-insoluble, aqueous-alkaline-soluble, non-photosensitive resist layer comprising a thermoplastic organic polymer,wherein said resist is able to adhere to a surface against which it is pressed at a temperature above 60.degree. C. The resist is useful as a protective layer in etching and coating processes in electronic circuitry technology.

Abstract: Multilayer protective coatings that are applied over a substrate are disclosed that comprise a plurality of superimposed multilayer units. Each multilayer unit contains two or more superimposed thin layers in which at least two layers are compositionally different. The properties of the resulting coating are a combination of the properties of the individual layers. One layer of a multilayer unit may provide hardness or wear resistance and another layer may provide lubricity, for example. The thickness of the individual layers can be related to the microscopic surface relief of the substrate to which the protective coating is applied.One disclosed multilayer unit comprises three layers: an oxidation resistant layer; a nitride layer; and a layer of disordered boron and carbon material.

Abstract: A composition for forming a transparent conductive film obtained by mixing an organic solution comprising an indium salt of inorganic acid and a tin salt of an inorganic acid with a non-aqueous silica sol. The composition of the present invention shows excellent stability with a lapse of time and good wettability to a substrate plate. A transparent conductive film obtained shows a strong adhesion strength to a substrate plate and has a two-layered structure.

Abstract: An improved magnetic recording medium comprising a magnetic layer formed by applying a ferromagnetic metal powder together with a binder to a non-magnetic base is described. The improvement is that the ferromagnetic metal powder has a saturation magnetism of 120 to 140 emu/g and a specific surface area measured by the BET method of 23 to 35 m/g, and the magnetic layer has a coercive force of 670 to 770 oersteds and a residual magnetic flux density of about 2,000 to 3,200 gauss. The magnetic recording medium is suitable for cassette tapes used in a high position and has excellent reproductive output in the whole band while keeping noise low.

Abstract: A blank adapted for use in custom fabrication of an implant for dental restoration includes first and second joined parts. The first part is made of the raw material of the ultimate implant, whereas the second part can be made of a different material. The second part is shaped to facilitate a positive support of the blank in a milling machine, and is preferably equipped with a code-bearing surface which permits information about the physical properties of the blank to be sensed by the machine. In a preferred realization, the first part is made from ceramic silica and the second part from aluminum, and the two are bonded by an acrylic glue.

Abstract: A printed circuit board having improved adhesion between solder mask and metal includes a primer film on the metal deposited from an aqueous solution which includes 0.01 to 10% by weight of a carboxyl-containing polymer or copolymer.