Concessão da patente
#16.1
03/27/1984
RPI 701
The letters patent expired on 07/06/1993: 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: 03/27/1984. We update with every new RPI gazette, published weekly.
Applicants
Shell Internationale Research Maatschappij B.V
NL
Inventors
G. R. (pessoa física)
US
IPC Classification
Priority claims
US
787647 · 04/14/1977
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
03/27/1984
RPI 701
#13.1
12/20/1983
RPI 687
#9.1
08/30/1983
RPI 671
#6.1
10/19/1982
RPI 626
#21.1
07/06/1993
RPI 1179
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.