20.11
05/23/1989
RPI 970
The letters patent expired on 03/19/1996: 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: 05/23/1989. We update with every new RPI gazette, published weekly.
Applicants
De Nora Permelec S.p.A.
IT
Inventors
B. G. (pessoa física)
M. G. (pessoa física)
N. A. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
05/23/1989
RPI 970
02/08/1989
RPI 955
#16.1
07/31/1984
RPI 719
#13.1
05/02/1984
RPI 706
#9.1
01/24/1984
RPI 692
#4.1
07/26/1983
RPI 666
#21.1
03/19/1996
RPI 1320
From the same holder
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