Concessão da patente
#16.1
09/27/1983
RPI 675
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: 09/27/1983. We update with every new RPI gazette, published weekly.
Applicants
Shell Internationale Research Maatschappij B.V
NL
Inventors
G. H. (pessoa física)
US
IPC Classification
Priority claims
US
762598 · 01/26/1977
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
09/27/1983
RPI 675
#13.1
06/21/1983
RPI 661
#9.1
03/01/1983
RPI 645
#15.11
02/22/1983
RPI 644
#6.1
07/13/1982
RPI 612
#21.1
07/20/1993
RPI 1181
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Same category
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