Solicitação de exame técnico
#4.1
08/15/1989
RPI 982
Application data
Number
PI8606292Type
Filing
Publication
The letters patent expired on 07/22/2008: 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: 08/15/1989. We update with every new RPI gazette, published weekly.
Applicants
Nalco Chemical Company
US
Inventors
D. F. (pessoa física)
US
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
08/15/1989
RPI 982
#3.1
07/05/1988
RPI 924
#2.1
04/28/1987
RPI 862
#21.1
Patente extinta em 19/12/2001
07/22/2008
RPI 1959
#16.1
12/26/1995
RPI 1308
#13.1
10/31/1995
RPI 1300
#9.1
06/20/1995
RPI 1281
#6.1
11/30/1993
RPI 1200
#6.1
05/04/1993
RPI 1170
#6.1
11/05/1991
RPI 1092
From the same holder
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.