20.4
09/01/1987
RPI 880
The letters patent expired on 08/03/1993: 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: 09/01/1987. We update with every new RPI gazette, published weekly.
Applicants
STANDARD OIL CO
Inventors
B. D. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
09/01/1987
RPI 880
#16.1
04/27/1982
RPI 601
#21.1
08/03/1993
RPI 1183
From the same holder
Same category
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