The present invention relates to the production of glasses included within particularly-defined ranges of the sodium silicate and/or potassium silicate composition system which will spontaneously degrade or disintegrate in the ambient atmosphere into relatively non-polluting residual material.

A railroad track tie comprises a body formed at least partially of polymeric material, and a reinforcement totally encapsulated within the body, wherein there is at least one opening through the reinforcement with polymeric material therein.

A safety system of a harness, in particular of the trapezoidal type, is suitable for use on watercraft such as a yacht or windsurfer. A basic element (10) is coupled to the harness. A hook (15), suitable for being hooked by a cable, is coupled to the basic element (10). The basic element (10) has a first piece (31) connected to the harness and a second piece (30, 15) that can be disconnected from said first piece (31). The first piece (31) is coupled to the second piece (30, 15) by a coupling (3...

Trioxopteridine derivatives of the formula ##STR1## , wherein R.sub.1 is a normal alkyl group having 0 to 6 hydroxyl groups and R.sub.2 is hydrogen or a normal lower alkyl group having 0 to 5 hydroxyl groups, are prepared by catalytically hydrogenating a 6-substituted-5-nitro-2,4-dioxopyrimidine to give a 6-substituted-5-amino-2,4-dioxopyrimidine, and then reacting the latter compound with a compound of the formula R.sub.2 --A--COOR.sub.3, wherein R.sub.3 is hydrogen, lower alkyl, an alkali meta...

A copy sheet suitable for thermocopying, containing an adhesive in at least one margin of the sheet, and a method for determining proper thermocopier adjustment by superimposing an original sheet over the copy sheet to form a set, and passing the set through the thermocopier a sufficient number of times, as determined by the production of a satisfactory copy of the original sheet.

A structure suitable for in vivo implantation as a tension member to substitute for tension members such as ligaments and tendons. The structure includes an elongate member which is a biocompatible film, a biocompatible fabric which has a weave having substantially no permanent yield in one direction after said film is formed thereon and a biocompatible porous material which promotes the ingrowth of living tissue and such material is either bonded to the exterior of the elongate member or is con...

The invention disclosed relates to a fastening suitable for a personal ornament, which comprises a male member (A) and a female member (B); the male member (A) including a base plate 21 on which a projecting portion 22 is provided; the female member (B) including a casing 23 which has a base plate 25 and an upstanding edge 26 formed by bending a marginal portion of the base plate 25. The base plate 25 has an opening 24 which can receive the projecting portion 22, and the upstanding edge 26 has a...

An endoscope suitable for autoclave sterilization includes an insertion section having an objective lens section disposed at the extreme end thereof for focusing a subject image and an eyepiece section located on the base end side of the inserting section and including at least an eyepiece lens. an image guide fiber is disposed in the bundle for transmitting the subject image in an observation section focused by the objective lens section. An eyepiece lens unit is disposed in the eyepiece sectio...

The present invention relates to a novel polymer comprising at least one unit derived from an ethylenically unsaturated compound containing at least one cyano functionality and at least one nonaromatic cyclic unit. The novel polymer is particularly useful when used in a photoresist composition sensitive in the deep ultraviolet region.

An inkjet printhead with a substrate having a plurality of inkjet nozzles formed in the substrate; the inkjet nozzles being arranged in groups, each group extending generally along a respective line along the substrate; wherein, at least two of the lines are intersecting, provides a printhead design that is well suited to use in a universal pen capable of changing the attributes of the marks it makes on a surface.