Publicação do pedido de patente
#3.1
09/20/1988
RPI 935
Application data
Number
PI8800437Type
Filing
Publication
The letters patent expired on 09/02/2008: 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: 09/20/1988. We update with every new RPI gazette, published weekly.
Applicants
Nalco Chemical Company
US
Inventors
R. S. (pessoa física)
US
R. D. (pessoa física)
US
Publications in the Brazilian Industrial Property Gazette (RPI).
#3.1
09/20/1988
RPI 935
#2.1
05/31/1988
RPI 919
#15.11
Procedimento automático de reclassificação. A classificação IPC anterior era C22B 11/04.
03/20/2018
RPI 2463
#21.1
Patente extinta em 04/02/2003
09/02/2008
RPI 1965
#16.1
06/27/1995
RPI 1282
#9.1
01/03/1995
RPI 1257
#4.1
10/09/1990
RPI 1036
From the same holder
Same category
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