Pedido de patente depositado
#2.1
05/30/1989
RPI 971
Application data
Number
PI8901896Type
Filing
Publication
The letters patent expired on 05/21/2013: 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: 05/30/1989. We update with every new RPI gazette, published weekly.
Applicants
Companhia Siderúrgica Nacional - CSN
RJ, BR
Inventors
Y. N. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#2.1
05/30/1989
RPI 971
#15.11
As classificações anteriores eram: G01N 1/36, B23K 31/12
08/25/2015
RPI 2329
#21.1
Patente extinta em 21/04/2009
05/21/2013
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#16.1
08/26/1997
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#13.1
03/25/1997
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09/24/1991
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11/06/1990
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