Concessão da patente
#16.1
12/27/1983
RPI 688
The letters patent expired on 07/20/1993: 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: 12/27/1983. We update with every new RPI gazette, published weekly.
Applicants
Shell Internationale Research Maatschappij B.V
NL
Inventors
D. S. (pessoa física)
US
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
12/27/1983
RPI 688
#13.1
10/04/1983
RPI 676
#9.1
06/14/1983
RPI 660
#6.1
11/16/1982
RPI 630
#7.1
02/09/1982
RPI 590
#21.1
07/20/1993
RPI 1181
From the same holder
Same category
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