18.8
08/25/1987
RPI 879
The letters patent expired on 11/17/1992: 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: 08/25/1987. We update with every new RPI gazette, published weekly.
Applicants
U. C. (pessoa física)
US
Inventors
E. B. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
08/25/1987
RPI 879
#18.2
06/02/1987
RPI 867
#16.1
02/24/1982
RPI 592
#15.11
Procedimento automático de reclassificação. As classificações IPC anteriores eram: C23C 7/00; B22F 1/00.
03/27/2018
RPI 2464
#21.1
11/17/1992
RPI 1146
From the same holder
Same category
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