Solicitação de exame técnico
#4.1
12/23/1986
RPI 844
Application data
Number
PI8602441Type
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: 12/23/1986. We update with every new RPI gazette, published weekly.
Applicants
Ashland Inc.
US
Ashland Oil, Inc
US
Inventors
G. L. (pessoa física)
US
IPC Classification
Priority claims
US
740.181 · 05/31/1985
Publications in the Brazilian Industrial Property Gazette (RPI).
#4.1
12/23/1986
RPI 844
#3.2
10/14/1986
RPI 834
#2.1
10/07/1986
RPI 833
#15.11
Procedimento automático de reclassificação. A classificação IPC anterior era C09D 3/72.
03/27/2018
RPI 2464
#21.1
Patente extinta em 28/05/2001
07/22/2008
RPI 1959
#25.4
11/11/1997
RPI 1406
#16.1
12/26/1995
RPI 1308
#13.1
10/31/1995
RPI 1300
#9.1
06/20/1995
RPI 1281
05/03/1994
RPI 1222
#6.1
05/11/1993
RPI 1171
#6.1
11/05/1991
RPI 1092
08/07/1990
RPI 1027
#15.6
05/08/1990
RPI 1017
03/01/1990
RPI 1007
Same category
Patent monitoring
Receive alerts on INPI events, decisions, and expiry dates for your portfolio.