20.4
12/29/1987
RPI 897
The letters patent expired on 09/21/1993: 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: 12/29/1987. We update with every new RPI gazette, published weekly.
Applicants
S. B. (pessoa física)
Inventors
K. J. (pessoa física)
T. R. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
12/29/1987
RPI 897
12/29/1987
RPI 897
#20.1
09/23/1986
RPI 831
12/18/1984
RPI 739
#16.1
07/27/1982
RPI 614
04/20/1982
RPI 600
#13.1
12/08/1981
RPI 581
#21.1
09/21/1993
RPI 1190
#20.1
08/04/1992
RPI 1131
07/28/1992
RPI 1130
07/28/1992
RPI 1130
10/01/1991
RPI 1087
07/31/1990
RPI 1026
#20.1
07/24/1990
RPI 1025
06/26/1990
RPI 1024
06/26/1990
RPI 1024
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.