02/09/1988
RPI 903
Pedido de licença compulsória
20.1
Invention PatentPI7904913
Union Carbide do Brasil Ltda.
The letters patent expired on 04/18/1995: 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: 02/09/1988. We update with every new RPI gazette, published weekly.
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
02/09/1988
RPI 903
20.1
03/10/1987
RPI 855
04/26/1983
RPI 653
16.1
01/25/1983
RPI 640
13.1
04/13/1982
RPI 599
6.1
04/18/1995
RPI 1272
21.1