Solicitação de exame técnico
#4.1
03/01/1988
RPI 906
Application data
Number
PI8601866Type
Filing
Publication
The letters patent expired on 07/22/2008: 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: 03/01/1988. We update with every new RPI gazette, published weekly.
Applicants
Petróleo Brasileiro S/A - Petrobrás
RJ, BR
Inventors
J. D. (pessoa física)
BR
V. V. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
03/01/1988
RPI 906
#3.1
11/10/1987
RPI 890
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10/29/1986
RPI 836
#21.1
Patente extinta em 25/04/2001
07/22/2008
RPI 1959
#16.1
03/30/1993
RPI 1165
#13.1
10/20/1992
RPI 1142
#15.11
08/25/1992
RPI 1134
#9.1
05/26/1992
RPI 1121
From the same holder
Same category
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