Concessão da patente
#16.1
06/28/1988
RPI 923
The letters patent expired on 09/27/1994: 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: 06/28/1988. We update with every new RPI gazette, published weekly.
Applicants
Companhia Siderúrgica Nacional - Grupo Siderbrás
RJ, BR
Inventors
E. J. (pessoa física)
F. D. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
06/28/1988
RPI 923
#13.1
03/01/1988
RPI 906
#9.1
11/10/1987
RPI 890
#6.1
03/17/1987
RPI 856
#4.1
05/20/1986
RPI 813
#3.1
07/02/1985
RPI 767
#2.1
02/07/1984
RPI 694
#21.1
09/27/1994
RPI 1243
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Same category
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