INPADOC Patent Family US4503447 (Original INPADOC file)
Publication No. Publication date Filing No. Priority Status Source Data
US 4503447A 1985-03-05 US 39874082A 19820716 US 39874082A 19820716 Expired National register (PAIR)
CA 1186807A1 1985-05-07 CA 427687A 19830509 US 39874082A 19820716 Expired Espacenet

INPADOC Legal Status 
US4503447 (Expired)
No INPADOC legal data



CA1186807 (Expired)
2002-05-08  +EXPIRY (CORRECTION)
2003-05-09  -EXPIRY