Pedido de certificado de adição de invenção
#5.1
04/11/1989
RPI 964
Application data
Number
PI8603088Type
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: 04/11/1989. We update with every new RPI gazette, published weekly.
Applicants
Shell Internationale Research Maatschappij B.V
NL
Inventors
H. M. (pessoa física)
P. K. (pessoa física)
IPC Classification
Priority claims
GB
8516920 · 07/04/1985
Publications in the Brazilian Industrial Property Gazette (RPI).
#5.1
04/11/1989
RPI 964
#4.1
02/08/1989
RPI 955
#3.1
02/17/1987
RPI 852
#2.1
01/06/1987
RPI 846
#15.11
Procedimento automático de reclassificação. As classificações IPC anteriores eram: E21B 43/32; B01F 17/12; C09K 7/00.
03/27/2018
RPI 2464
#21.1
Patente extinta em 02/07/2001
07/22/2008
RPI 1959
#16.1
10/30/1990
RPI 1039
#9.1.2
08/07/1990
RPI 1027
#9.1
05/29/1990
RPI 1020
#13.1
05/22/1990
RPI 1019
#9.1
02/01/1990
RPI 1004
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.