Solicitação de exame técnico
#4.1
08/25/1987
RPI 879
Application data
Number
PI8506248Type
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: 08/25/1987. We update with every new RPI gazette, published weekly.
Applicants
Petróleo Brasileiro S/A - Petrobrás
RJ, BR
Inventors
L. L. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
08/25/1987
RPI 879
#3.1
06/30/1987
RPI 871
#2.1
02/25/1986
RPI 801
#15.11
Procedimento automático de reclassificação. A classificação IPC anterior era C01B 33/28.
03/27/2018
RPI 2464
#21.1
Patente extinta em 13/12/2000
07/15/2008
RPI 1958
#16.1
09/24/1991
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06/11/1991
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