Concessão da patente
#16.1
01/25/1983
RPI 640
The letters patent expired on 07/06/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.
Talk to a specialistLatest action published by the INPI: 01/25/1983. We update with every new RPI gazette, published weekly.
Applicants
Shell Internationale Research Maatschappij B.V
NL
Inventors
S. D. (pessoa física)
US
W. G. (pessoa física)
US
IPC Classification
Priority claims
US
693,463 · 06/07/1976
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
01/25/1983
RPI 640
#13.1
11/30/1982
RPI 632
#9.1
07/13/1982
RPI 612
#6.1
12/01/1981
RPI 580
#21.1
07/06/1993
RPI 1179
From the same holder
Same category
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