20.4
09/08/1987
RPI 881
The letters patent expired on 07/06/1993: 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: 09/08/1987. We update with every new RPI gazette, published weekly.
Applicants
STANDARD OIL CO
Inventors
S. E. (pessoa física)
Z. W. (pessoa física)
Publications in the Brazilian Industrial Property Gazette (RPI).
09/08/1987
RPI 881
#16.1
10/25/1983
RPI 679
#13.1
09/06/1983
RPI 672
#9.1
04/19/1983
RPI 652
#7.1
08/17/1982
RPI 617
#21.1
07/06/1993
RPI 1179
From the same holder
Same category
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