20.7
09/02/1986
RPI 828
The letters patent expired on 05/24/1994: 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
ISHIHARA MINING & CHEMICAL CO
Inventors
F. K. (pessoa física)
H. T. (pessoa física)
N. K. (pessoa física)
N. R. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
09/02/1986
RPI 828
#16.1
08/30/1983
RPI 671
#13.1
06/14/1983
RPI 660
#9.1
02/16/1983
RPI 643
#15.11
11/30/1982
RPI 632
#6.1
08/03/1982
RPI 615
#21.1
05/24/1994
RPI 1225
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.