Solicitação de exame técnico
#4.1
05/09/1989
RPI 968
The letters patent expired on 12/19/1995: 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: 05/09/1989. We update with every new RPI gazette, published weekly.
Applicants
Usinas Siderúrgicas de Minas Gerais S/A - Usiminas
MG, BR
Inventors
H. S. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
05/09/1989
RPI 968
01/31/1989
RPI 954
#4.2
08/09/1988
RPI 929
#3.1
06/23/1987
RPI 870
#2.1
03/25/1986
RPI 805
#21.1
12/19/1995
RPI 1307
#16.1
08/04/1992
RPI 1131
#13.1
03/31/1992
RPI 1113
#9.1
11/12/1991
RPI 1093
#6.1
06/18/1991
RPI 1072
#6.1
12/18/1990
RPI 1046
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