Solicitação de exame técnico
#4.1
10/18/1988
RPI 939
Application data
Number
PI8700104Type
Filing
Publication
The letters patent expired on 07/29/2008: 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: 10/18/1988. We update with every new RPI gazette, published weekly.
Applicants
Petróleo Brasileiro S/A - Petrobrás
RJ, BR
Inventors
J. O. (pessoa física)
BR
R. R. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
10/18/1988
RPI 939
#3.1
08/02/1988
RPI 928
#2.1
05/12/1987
RPI 864
#21.1
Patente extinta em 13/01/2002
07/29/2008
RPI 1960
#16.1
10/26/1993
RPI 1195
#13.1
08/03/1993
RPI 1183
#9.1
04/13/1993
RPI 1167
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