Publicação do pedido de patente
#3.1
12/15/1987
RPI 895
Application data
Number
PI8700808Type
Filing
Publication
The letters patent expired on 07/29/2008: 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: 12/15/1987. We update with every new RPI gazette, published weekly.
Applicants
Nalco Chemical Company
US
Inventors
D. F. (pessoa física)
US
Publications in the Brazilian Industrial Property Gazette (RPI).
#3.1
12/15/1987
RPI 895
#2.1
06/16/1987
RPI 869
#21.1
Patente extinta em 20/02/2002
07/29/2008
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10/26/1993
RPI 1195
#13.1
08/24/1993
RPI 1186
#9.1
04/27/1993
RPI 1169
#6.1
07/07/1992
RPI 1127
#6.1
11/05/1991
RPI 1092
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08/07/1990
RPI 1027
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