Compounds corresponding to the formula ##SPC1## Wherein X represents chloro, bromo, or fluoro; R represents one of cyano (-CN), carbamoyl (-CONR.sup.3 R.sup.4) or carboxy (-COOH) or the carboxylic acid salts thereof; each of R.sup.3 and R.sup.4 independently represents hydrogen or alkyl of 1 to 8 carbon atoms: M represents hydrogen or loweralkyl; R.sup.1 represents hydrogen, loweralkyl, amino or loweralkyl-amino of 1 to 4 carbon atoms; and R.sup.2 represents hydrogen, X, loweralkyl, amino or low...

A construction set comprises a plurality of skeletal tetrahedrons and interconnecting means therefor so that they can be assembled in a plurality of groups of different configuration and rotated relative to each other. The legs of the tetrahedrons have flange configurations for receiving correspondingly flanged resilient connectors.

Improved fasteners providing superior bonding and holding power in wood or other materials. A variety of coated fasteners including single-bevel divergent point staples and an adhesive and coating composition to secure staples and other fasteners together in contiguous relation and to provide increased bonding holding power in the material into which the fastener is driven are disclosed.

A pilot operated three-way diaphragm valve having a vent valve including a closed end metal cylinder having an open end to receive the three-way valve exhaust. The cylinder has holes through it. A rubber tube is assembled over the cylinder. The cylinder and tube have an interference fit. The tube seals the cylinder holes shut until the differential pressure across the vent valve to cause venting rises to a predetermined pressure. The tube also has holes which do not lie in registration with thos...

The molecular weight of polyalkenamers produced by the ring-opening polymerization of cyclic olefins can be regulated by conducting at least a portion of the polymerization reaction in the presence of a hydrocarbon monoolefin of the formula ##SPC1## Wherein R.sub.1, R.sub.2 and R.sub.3 are hydrogen, saturated alkyl or cycloalkyl or aryl. Novel polyalkenamers thus produced include those formed of 2 to 50,000 polymer units of one of the formulae ##SPC2## Wherein R is H, alkyl, cycloalkyl or aryl; ...

A highly satisfactory carpet is prepared by applying to the back of a filamentary carpet a mixture of expandable microspheres and a film forming binder, drying and foaming the mixture on the carpet back. The resultant backed carpet shows excellent resiliency and resistance to permanent set.

A stainless steel trim member, a method of making a stainless steel trim member and an assembly comprised of a stainless steel trim member in combination with a metallic body member. The stainless steel trim member has an exposed surface, a contact surface which converges with the exposed surface, a connecting surface which joins the exposed surface and the contact surface, and an inner surface opposite the exposed, contact and connecting surfaces. Adhered to the inner surface is a layer of sacr...

Novel polyselenophenes comprising one or more structural units of the formulae (I) or (II) or (I) and (II) ##STR1## processes for preparing them, monomers for their preparation, their use in various technical sectors, and an electrically conducting material comprising them.

The compounds of the formula I ##STR1## in which R.sub.1 to R.sub.3 denote, independently of one another, hydrogen or a (C.sub.1 -C.sub.18)-acyl group, and a process for the preparation thereof are described. These compounds have tumor-inhibiting properties.

Novel substituted aryloxyureas, processes for their production, and herbicides comprising them as active ingredients are provided. The substituted aryloxyureas exhibit an excellent herbicidal efficacy against weeds when applied, for example, to the weeds in a wide range of period from a preemergence stage to a growth stage. The substituted aryloxyureas of the invention have the excellent advantage of maintaining high safety on crops or crop plants in spite of their herbicidal efficacy.