Legal status (The legal status 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 status listed.)
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 claimed from US415085Aexternal-prioritypatent/US3887840A/en
Application filedfiledCritical
Priority to US51081174priorityCriticalpatent/UST944002I4/en
Application grantedgrantedCritical
Publication of UST944002I4publicationCriticalpatent/UST944002I4/en