20.7
09/02/1986
RPI 828
The letters patent expired on 07/20/1993: 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: 09/02/1986. We update with every new RPI gazette, published weekly.
Applicants
K. T. (pessoa física)
Inventors
K. T. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
09/02/1986
RPI 828
#16.1
08/17/1982
RPI 617
#13.1
12/08/1981
RPI 581
#21.1
07/20/1993
RPI 1181
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.