20.4
07/11/1989
RPI 977
The letters patent expired on 11/24/1992: 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: 07/11/1989. We update with every new RPI gazette, published weekly.
Applicants
M. C. (pessoa física)
JP
Inventors
E. B. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
07/11/1989
RPI 977
#16.2
07/24/1984
RPI 718
#16.1
07/01/1980
RPI 506
#15.11
Procedimento automático de reclassificação. As classificações IPC anteriores eram: C07C 47/00; C07C 45/02.
03/27/2018
RPI 2464
#21.1
11/24/1992
RPI 1147
From the same holder
Same category
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