300
05/09/1989
RPI 968
The letters patent expired on 09/21/1993: 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: 05/09/1989. We update with every new RPI gazette, published weekly.
Applicants
LUBRIZOL CORP
Inventors
D. K. (pessoa física)
M. N. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
05/09/1989
RPI 968
01/10/1989
RPI 951
#17.1
05/17/1988
RPI 917
04/05/1988
RPI 911
#17.1
10/20/1987
RPI 887
#16.1
03/17/1987
RPI 856
08/26/1986
RPI 827
#12.1
09/25/1984
RPI 727
#9.1
06/05/1984
RPI 711
#6.1
11/22/1983
RPI 683
#6.1
02/01/1983
RPI 641
#21.1
09/21/1993
RPI 1190
From the same holder
Same category
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