Concessão da patente
#16.1
10/30/1984
RPI 732
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: 10/30/1984. 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
787646 · 04/14/1977
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
10/30/1984
RPI 732
#13.1
08/07/1984
RPI 720
#9.1
04/17/1984
RPI 704
#6.1
09/13/1983
RPI 673
#6.1
02/01/1983
RPI 641
#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.