20.7
11/10/1987
RPI 890
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: 11/10/1987. We update with every new RPI gazette, published weekly.
Applicants
The Standard Oil Company
US
Inventors
E. B. (pessoa física)
Publications in the Brazilian Industrial Property Gazette (RPI).
11/10/1987
RPI 890
#16.1
07/27/1982
RPI 614
#13.1
11/17/1981
RPI 578
#15.11
Procedimento automático de reclassificação. As classificações IPC anteriores eram: B01J 21/02; B01J 21/06; B01J 23/68; B01J 23/72; B01J 27/18; C07B 3/00.
03/27/2018
RPI 2464
#21.1
11/24/1992
RPI 1147
From the same holder
Same category
Patent monitoring
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