Solicitação de exame técnico
#4.1
10/31/1989
RPI 993
Application data
Number
PI8704949Type
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: 10/31/1989. We update with every new RPI gazette, published weekly.
Applicants
Petróleo Brasileiro S/A - Petrobrás
RJ, BR
Inventors
C. H. (pessoa física)
BR
E. B. (pessoa física)
BR
L. B. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
10/31/1989
RPI 993
#3.1
03/28/1989
RPI 962
#2.1
12/22/1987
RPI 896
#15.11
Procedimento automático de reclassificação. As classificações IPC anteriores eram: C09K 7/02; E21B 33/13.
03/27/2018
RPI 2464
#21.1
Patente extinta em 25/09/2002
07/29/2008
RPI 1960
#16.1
03/26/1996
RPI 1321
#13.1
11/14/1995
RPI 1302
#9.1
07/04/1995
RPI 1283
#6.1
09/14/1993
RPI 1189
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.