20.4
09/01/1987
RPI 880
The letters patent expired on 08/25/1992: 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
A. C. (pessoa física)
US
Inventors
E. B. (pessoa física)
Publications in the Brazilian Industrial Property Gazette (RPI).
09/01/1987
RPI 880
#16.1
05/25/1982
RPI 605
#13.1
12/22/1981
RPI 583
#15.11
Procedimento automático de reclassificação. A classificação IPC anterior era C07C 63/02.
03/27/2018
RPI 2464
#21.1
08/25/1992
RPI 1134
From the same holder
Same category
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