Concessão da patente
#16.1
06/28/1988
RPI 923
The letters patent expired on 05/03/1994: 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: 06/28/1988. We update with every new RPI gazette, published weekly.
Applicants
LUBRIZOL CORP
Inventors
D. K. (pessoa física)
H. T. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
06/28/1988
RPI 923
#13.1
05/10/1988
RPI 916
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11/10/1987
RPI 890
#6.1
01/27/1987
RPI 849
#6.1
08/09/1983
RPI 668
#6.1
10/26/1982
RPI 627
#4.1
01/12/1982
RPI 586
#21.1
05/03/1994
RPI 1222
From the same holder
Same category
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