Abstract: Fiber optic transmission technologies that allow DPSK or even higher order PSK to be performed at 20 gigabits per second per channel or even higher bit rates in a WDM (e.g., DWDM) wavelength multiplexed channeling environment. The technology employs pre-compensation of chromatic error dispersion such for each of most, if not all, channels have a portion of minimum absolute accumulated dispersion that occurs somewhere within the length (perhaps at the mid-point) of the optical channel. Post-compensation is then employed at the receiver to reduce or even potentially eliminate the chromatic dispersion. The technology allows for reduced bit error rates at high bit rates over even very long haul (e.g., trans-oceanic submarine or long terrestrial) optical fiber links, and for all channels.

Abstract: Fiber optic transmission technologies that allow DPSK or even higher order PSK to be performed at 20 gigabits per second per channel or even higher bit rates in a WDM (e.g., DWDM) wavelength multiplexed channeling environment. The technology employs pre-compensation of chromatic error dispersion such for each of most, if not all, channels have a portion of minimum absolute accumulated dispersion that occurs somewhere within the length (perhaps at the mid-point) of the optical channel. Post-compensation is then employed at the receiver to reduce or even potentially eliminate the chromatic dispersion. The technology allows for reduced bit error rates at high bit rates over even very long haul (e.g., trans-oceanic submarine or long terrestrial) optical fiber links, and for all channels.

Abstract: Crude oil middle distillates with improved cold flow properties, containing small amounts ofA. conventional flow improver on an ethylene base, andB. copolymers which consist of 10 to 95 mol-% of one or more acrylacrylates or alkylmethacrylates with C.sub.1 - to C.sub.26 -alkyl chains, and of 5 to 90 mol-% of one or more ethylenically unsaturated dicarboxylic acids or their anhydrides, where the copolymer is reacted to a large extent with one or several primary or secondary amines into the monoamide or amide/ammonia salt of dicarboxylic acid, and the quantitative proportion of A to B is from 40 to 60 up to 95 to 5.

Abstract: Novel reaction products of aminoalkylene polycarboxylic acids with secondary amines and their use as additives to middle distillates together with conventional ethylene copolymers as flow improvers and conductivity improves.

Abstract: Pumpable free-flowing aqueous coal dispersions containing a special non-ionic dispersant which is a polyalkylene oxide bisphenol A derivative, and the use of the said dispersant in coal/water dispersions.

Abstract: Aqueous, pumpable, free-flowing coal dispersions which may contain methanol and contain a special, oxyethylated, straight-chain, saturated fatty alcohol mixture as a nonionic dispersant, and the use of this dispersant in coal/water dispersions.

Abstract: Petroleum demulsifiers which contain, as the active ingredients, oxyalkylated isoalkylphenol-formaldehyde resins and oxyalkylated polyalkylenepolyamines.

Abstract: Salts of polymaleic acids, having molecular weights of from 200 to 1,500, with amines, of the formula ##STR1## where R.sup.1 and R.sup.2 are identical or different and each is hydrogen, C.sub.9 -C.sub.20 -alkyl or C.sub.9 -C.sub.20 -alkenyl and R.sup.3 is C.sub.9 -C.sub.20 -alkyl or C.sub.9 -C.sub.20 -alkenyl.

Abstract: Ethylene-alkyne copolymers and ethylene-alkyne-alkene terpolymers. The copolymers and terpolymers have a number-average molecular weight, determined by vapor phase osmometry, of from 500 to 500,000 and contain, as copolymerized units,(A) from 70 to 99 percent by weight of ethylene and(B) an acetylenically unsaturated compound of the formula (I)H--C.tbd.C--R.sup.1 Iwhere R.sup.1 is (OCH.sub.2 CH.sub.2).sub.n H or CH.sub.2 -R.sup.2, n is 1-20, R.sup.2 is -OH, -OCOR.sup.3 or -COOR.sup.3 and R.sup.3 is straight-chain or branched C.sub.1 -C.sub.10 -alkyl. The terpolymers contain, as copolymerized units, from 50 to 99 percent by weight of (A), from 0.5 to 30 percent by weight of (B) and, in addition, (C) from 0.5 to 49.5 percent by weight of an olefinically unsaturated ester of the formula (II) ##STR1## where R.sup.4 is H or CH.sub.3, R.sup.5 is -OOC-R.sup.6 or -COOR.sup.6 and R.sup.6 is straight-chain or branched C.sub.1 -C.sub.10 -alkyl.

Abstract: Polyhydroxy-polyalkylene-polyamine salts of maleic amide acids are useful metal corrosion inhibitors for use in water-in-oil emulsions.