14.1
12/05/1989
RPI 998
Application data
Number
PI8703947Type
Filing
Publication
The letters patent expired on 07/29/2008: 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: 12/05/1989. We update with every new RPI gazette, published weekly.
Applicants
Pangaea Enterprises, Inc
US
Inventors
H. C. (pessoa física)
US
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
12/05/1989
RPI 998
11/28/1989
RPI 997
#3.1
02/14/1989
RPI 956
#2.1
10/20/1987
RPI 887
#15.11
As classificações anteriores eram: E21B 17/18, E21B 47/12, E21B 47/06.
08/28/2012
RPI 2173
#21.1
Patente extinta em 31/07/2002
07/29/2008
RPI 1960
#16.1
11/30/1993
RPI 1200
#9.1
06/29/1993
RPI 1178
#4.1
06/11/1991
RPI 1071
Same category
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