Pedido de patente depositado
#2.1
02/21/1989
RPI 957
Application data
Number
PI8900114Type
Filing
Publication
The letters patent expired on 12/15/2009: 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: 02/21/1989. We update with every new RPI gazette, published weekly.
Applicants
Companhia Siderúrgica Nacional - CSN
RJ, BR
Inventors
N. S. (pessoa física)
BR
W. D. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#2.1
02/21/1989
RPI 957
#21.1
Patente extinta em 11/01/2004
12/15/2009
RPI 2032
#16.1
08/29/1995
RPI 1291
#13.1
05/23/1995
RPI 1277
#9.1
01/03/1995
RPI 1257
#4.1
12/04/1990
RPI 1044
#3.1
08/14/1990
RPI 1028
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