20.4
01/10/1984
RPI 690
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: 01/10/1984. We update with every new RPI gazette, published weekly.
Applicants
DEGUSSA
Inventors
K. H. (pessoa física)
S. C. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
01/10/1984
RPI 690
#16.1
07/27/1982
RPI 614
#13.1
11/10/1981
RPI 577
#21.1
08/03/1993
RPI 1183
From the same holder
Same category
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