Solicitação de exame técnico
#4.1
10/18/1988
RPI 939
Application data
Number
PI8601763Type
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: 10/18/1988. We update with every new RPI gazette, published weekly.
Applicants
Petróleo Brasileiro S/A - Petrobrás
RJ, BR
Inventors
J. R. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
10/18/1988
RPI 939
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11/10/1987
RPI 890
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10/29/1986
RPI 836
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Patente extinta em 18/04/2001
07/22/2008
RPI 1959
#16.1
06/30/1992
RPI 1126
#13.1
02/11/1992
RPI 1106
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10/08/1991
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