Concessão da patente
#16.1
12/27/1983
RPI 688
The letters patent expired on 08/19/2008: 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: 12/27/1983. We update with every new RPI gazette, published weekly.
Applicants
NALCO CHEMICAL COMPANY
US
Inventors
J. M. (pessoa física)
US
M. S. (pessoa física)
US
IPC Classification
Priority claims
US
701.785 · 07/01/1976
US
711.010 · 08/02/1976
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
12/27/1983
RPI 688
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#7.1
12/14/1982
RPI 634
#6.1
01/05/1982
RPI 585
#21.1
Patente extinta em 31/05/92
08/19/2008
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