18.8
01/19/1988
RPI 900
The letters patent expired on 07/27/1993: 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: 01/19/1988. We update with every new RPI gazette, published weekly.
Applicants
ALCAN RES & DEV
Inventors
S. O. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
01/19/1988
RPI 900
#18.2
11/24/1987
RPI 892
#16.1
04/27/1982
RPI 601
#21.1
07/27/1993
RPI 1182
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.