Pedido de patente depositado
#2.1
09/26/1989
RPI 988
Application data
Number
PI8804921Type
Filing
Publication
The letters patent expired on 12/18/2012: 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: 09/26/1989. We update with every new RPI gazette, published weekly.
Applicants
Usinas Siderúrgicasde Minas Gerais S/A - Usiminas
MG, BR
Inventors
G. R. (pessoa física)
BR
R. S. (pessoa física)
BR
Y. S. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#2.1
09/26/1989
RPI 988
#21.1
Patente extinta em 27/07/2009
12/18/2012
RPI 2189
#15.11
Alterado da Int Cl5 E01C 7/18.
11/21/2000
RPI 1559
#16.1
07/27/1999
RPI 1490
#9.1
De acordo com o artigo 229 da LPI nº9279 de 14/05/96.
03/02/1999
RPI 1469
#6.1
08/11/1998
RPI 1442
10/07/1997
RPI 1401
#15.3
09/17/1996
RPI 1346
01/09/1996
RPI 1310
#4.1
07/23/1991
RPI 1077
#3.1
05/15/1990
RPI 1018
Same category
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