Solicitação de exame técnico
#4.1
04/25/1989
RPI 966
The letters patent expired on 09/18/2001: 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: 04/25/1989. We update with every new RPI gazette, published weekly.
Applicants
Alcan Alumínio do Brasil S/A
SP, BR
Alcoa Alumínio S/A
MG, BR
Inventors
N. K. (pessoa física)
BR
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
04/25/1989
RPI 966
#3.1
01/17/1989
RPI 952
#2.1
12/01/1987
RPI 893
#21.1
Patente extinta em 13/07/97 conforme disposto no artigo 24 da Lei 5772/71 (CPI).
09/18/2001
RPI 1602
#25.1
Transferido de; Alcan Alumínio S/A
06/23/1998
RPI 1435
#16.1
07/27/1993
RPI 1182
#13.1
05/04/1993
RPI 1170
#9.1
01/19/1993
RPI 1155
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