Chemically degraded, substantially atactic-free stereo-regular polyolefin resin exhibiting a sharp X-ray diffraction and distinctly modified thermal behavior compared to its precursor resin is disclosed herein. This material is readily mechanically attrited to obtain a product capable of forming a stable colloidal dispersion in a liquid medium having a minimal swelling action thereon. The chemically degraded polyolefin is prepared by a thermal catalytic oxidation treatment whereby the long chain...

As new compounds 17-beta-alkyl-phenoxyacetates of 19-norandrostenolone or 19-nor-testosterone of the formula: ##SPC1## In which R.sup.1 is a primary, secondary or tertiary alkyl group of less than 12 carbon atoms and R.sup.2 R.sup.3, R.sup.4, and R.sup.5 are the same or different and each is either hydrogen, chlorine or a methyl group. The compounds have anabolic or androgenic activity.

New and useful antibiotic substances which are called the SF-837 substance, SF-837-A.sub.2 substance, SF-837-A.sub.3 substance and SF-837-A.sub.4 substance, respectively and which are all valuable for the treatment of infections by Gram-positive pathogenic bacteria may be isolated from the culture of a new micro-organism Streptomyces mycarofaciens.

Semiconductor devices such as transistors are manufactured by use of a longitudinally extending tape-like carrier including a metallic layer secured to a flexible insulative layer, with the insulative layer having centrally located longitudinally spaced apertures. These apertures are covered by the metallic layer and are dimensioned to encompass contact regions of a semiconductor body such as a transistor or monolithic integrated circuit pellet. Longitudinally spaced sets of finger-like leads ar...

Liquid composition suitable for application to steel surfaces such as pipe interiors, which cure in situ to provide rubbery linings and coatings, comprise a terminally reactive diolefin polymer such as dibromopoly-butadiene, a curative for the polymer, a rubbery thermoplastic polymer such as a styrene butadiene block copolymer, and a solvent.

An oxygen scavenger composition characterized by (1) a catalyst comprising an anthraquinone disulfonic acid or salt thereof and a vanadate salt such as sodium vanadate and (2) a reducing agent such as H.sub.2 S or hydrazine; and processes for scavenging, with said composition, oxygen from corrosive media including oxygen or air wherein said oxygen or air causes said media to be corrosive or to increase the corrosiveness of said media.

A piston ring with a highly wear-resistant sliding surface of tungsten-cobalt electrodeposit and a sliding ring of a sintered mixture of iron oxide and carbon powder.

A vibration densitometer that computes and transmits the difference between actual density and a known, constant reference density. A pulse former circuit produces a pulse train useful in producing a linear density difference analog. Two integrators and one sample and hold circuit are employed in the computation. A single one shot actuates both integrators and the sample and hold circuit. A scale factor circuit is employed for calibration and to convert the difference analog to an analog of abso...

Disclosed are an article of safety footwear, a method of making the same, and a safety toe cap assembly adapted to be used in making such footwear. The article of safety footwear has a rigid, crush-resistant toe cap located in its toe region and having its outer surface bonded to the interior of the upper of the footwear article, a cushioning layer of resilient, compressible cellular (open-celled or closed cell or having both open and closed cells) cures elastomeric polymeric material, typically...

Polyalkenamers are produced by a ring-opening polymerization of cyclic olefins employing a catalyst containing a tungsten or molybdenum compound and conducting the polymerization in the presence of an ethylenically unsaturated halogenated hydrocarbon wherein one of the double bonded carbon atoms is substituted by chlorine, bromine or iodine or halogenated alkyl or aryl and at least one hydrogen atom.