6.2
05/30/1989
RPI 971
Application data
Number
PI8504489Type
Filing
Publication
The letters patent expired on 07/15/2008: 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: 05/30/1989. We update with every new RPI gazette, published weekly.
Applicants
Nalco Chemical Company
US
Inventors
L. C. (pessoa física)
US
R. S. (pessoa física)
Publications in the Brazilian Industrial Property Gazette (RPI).
05/30/1989
RPI 971
#4.1
07/07/1987
RPI 872
03/31/1987
RPI 858
#3.1
07/15/1986
RPI 821
#2.1
11/19/1985
RPI 787
#21.1
Patente extinta em 16/09/2000
07/15/2008
RPI 1958
#16.1
11/26/1991
RPI 1095
#15.11
11/05/1991
RPI 1092
#13.1
08/20/1991
RPI 1081
#9.1
05/07/1991
RPI 1066
#6.1
11/27/1990
RPI 1043
#6.1
03/13/1990
RPI 1009
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Same category
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