6.2
06/13/1989
RPI 973
Application data
Number
PI8504707Type
Filing
Publication
The letters patent expired on 07/15/2008: 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: 06/13/1989. We update with every new RPI gazette, published weekly.
Applicants
Sherritt Gordon Mines Limited
CA
Inventors
D. W. (pessoa física)
CA
R. G. (pessoa física)
CA
Publications in the Brazilian Industrial Property Gazette (RPI).
06/13/1989
RPI 973
#4.1
09/13/1988
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07/22/1986
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12/03/1985
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#15.11
Procedimento automático de reclassificação. A classificação IPC anterior era C22B 11/04.
03/27/2018
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Patente extinta em 25/09/2000
07/15/2008
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02/13/1991
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