Solicitação de exame técnico
#4.1
08/11/1987
RPI 877
Application data
Number
PI8506493Type
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: 08/11/1987. We update with every new RPI gazette, published weekly.
Applicants
Kaiser Aluminum & Chemical Corporation
US
Nalco Chemical Company
US
Inventors
J. M. (pessoa física)
US
W. R. (pessoa física)
US
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
08/11/1987
RPI 877
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#3.1
09/02/1986
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04/01/1986
RPI 806
#21.1
Patente extinta em 26/12/2000
07/15/2008
RPI 1958
#16.1
10/29/1991
RPI 1091
#13.1
07/16/1991
RPI 1076
#9.1
04/02/1991
RPI 1061
#6.1
10/30/1990
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