Solicitação de exame técnico
#4.1
06/23/1987
RPI 870
Application data
Number
PI8504611Type
Filing
Publication
The letters patent expired on 07/15/2008: 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: 06/23/1987. We update with every new RPI gazette, published weekly.
Applicants
Petróleo Brasileiro S/A - Petrobrás
RJ, BR
Inventors
D. B. (pessoa física)
BR
J. F. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
06/23/1987
RPI 870
#3.1
04/28/1987
RPI 862
#2.1
12/03/1985
RPI 789
#21.1
Patente extinta em 20/09/2000
07/15/2008
RPI 1958
#15.11
06/25/1991
RPI 1073
#16.1
04/30/1991
RPI 1065
#13.1
01/08/1991
RPI 1049
#9.1
09/25/1990
RPI 1034
From the same holder
Same category
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