Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US06/934,107priorityCriticalpatent/US4784742A/en
Priority claimed from US06/934,107external-prioritypatent/US4784742A/en
Application filed by Norsk Hydro A/SfiledCriticalNorsk Hydro A/S
Publication of NO874666D0publicationCriticalpatent/NO874666D0/no
Publication of NO874666LpublicationCriticalpatent/NO874666L/no
Publication of NO172400BpublicationCriticalpatent/NO172400B/no
Publication of NO172400CpublicationCriticalpatent/NO172400C/no