Solicitação de exame técnico
#4.1
05/09/1989
RPI 968
The letters patent expired on 11/07/1995: 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 - USIMINAS (Grupo Siderbrás)
MG, BR
Inventors
A. C. (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
05/12/1987
RPI 864
#2.1
12/31/1985
RPI 793
#21.1
11/07/1995
RPI 1301
#16.1
12/31/1991
RPI 1100
#13.1
10/08/1991
RPI 1088
#9.1
06/11/1991
RPI 1071
#6.1
01/15/1991
RPI 1050
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