Magne Randor Bjelkstrøm/Bjelkstrom

Can anyone please help to find the demise of Magne born June 18, 1919 in Norway. Educated as a mechanic/ship builder. Left his decendants in Norway and vanished without a trace in USA. A google search shows that he arrived New York in 1953. He was alive in 1978 when his name appeared in his brothers death notice in Norway together with his partner Lucille. It would be very interesting to learn where he and Lucille lived and died and if he had any children.