Carta-patente expirada
#21.1
Patente extinta em 30/11/2004
12/29/2009
RPI 2034
Application data
Number
PI8906034Type
Filing
Publication
The letters patent expired on 12/29/2009: 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: 12/29/2009. We update with every new RPI gazette, published weekly.
Applicants
Companhia Siderúrgica Nacional - CSN
RJ, BR
Inventors
C. M. (pessoa física)
BR
S. N. (pessoa física)
BR
W. D. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#21.1
Patente extinta em 30/11/2004
12/29/2009
RPI 2034
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08/16/1994
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09/24/1991
RPI 1086
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06/04/1991
RPI 1070
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03/20/1990
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