Bloomberg Halliburton Co. isn’t content to limit its battle for market share with Schlumberger Ltd. to the oil field these days. It’s opened a new front in an unlikely place: the patent office. The Houston-based provider of drilling services is waging an aggressive campaign to persuade the US Patent and Trademark Office to cancel some of Schlumberger’s fracking-related patents, telling ...

Bloomberg Oil slid to a two-week low and headed for its longest losing streak in two months as a plunge in US equities dragged other markets lower. Crude futures in New York fell a third day, sliding as much as 1.3 percent. Stock indexes from Japan to Germany tumbled on Tuesday after a frantic sell-off in US shares sent the ...

Bloomberg Serbia and Montenegro may join the European Union by 2025, the bloc’s executive will say, urging the western Balkan countries to improve the rule of law, curb corruption and put aside past grudges to enter the world’s largest trading club. The EU is offering a path to membership two decades after the bloody breakup of the former Yugoslavia. Along ...