Pedido de patente depositado
#2.1
11/07/1989
RPI 994
The letters patent expired on 11/20/2001: 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: 11/07/1989. We update with every new RPI gazette, published weekly.
Applicants
Companhia Siderúrgica Nacional - CSN
RJ, BR
Instituto de Pesquisas Tecnológicas de São Paulo S/A - IPT
SP, BR
Inventors
E. P. (pessoa física)
BR
F. S. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#2.1
11/07/1989
RPI 994
#21.1
Patente extinta em 11/07/1999 conforme o disposto no artigo 24 da Lei 5772 (CPI).
11/20/2001
RPI 1611
#16.1
11/29/1994
RPI 1252
#13.1
08/23/1994
RPI 1238
06/14/1994
RPI 1228
#12.2
02/16/1994
RPI 1211
#9.2
09/21/1993
RPI 1190
05/18/1993
RPI 1172
#4.1
09/24/1991
RPI 1086
#3.1
05/14/1991
RPI 1067
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