06/14/1988
RPI 921
Solicitação de exame técnico
4.1
Invention PatentPI8405939
Union Carbide do Brasil Ltda.
The letters patent expired on 07/08/2008: 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: 06/14/1988. We update with every new RPI gazette, published weekly.
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
06/14/1988
RPI 921
4.1
03/15/1988
RPI 908
10/06/1987
RPI 885
06/17/1986
RPI 817
3.1
11/19/1985
RPI 787
2.1
07/08/2008
RPI 1957
21.1
Patente extinta em 22/11/99
08/25/1992
RPI 1134
16.1
08/11/1992
RPI 1132
15.11
03/03/1992
RPI 1109
13.1
10/22/1991
RPI 1090
9.1
03/05/1991
RPI 1057
6.1