Concessão da patente
#16.1
08/30/1988
RPI 932
Application data
Number
PI8207594Type
Filing
Publication
The letters patent expired on 07/01/2008: 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: 08/30/1988. We update with every new RPI gazette, published weekly.
Applicants
Hydril Company
US
Inventors
E. M. (pessoa física)
F. M. (pessoa física)
H. J. (pessoa física)
IPC Classification
Publications in the Brazilian Industrial Property Gazette (RPI).
#16.1
08/30/1988
RPI 932
#13.1
06/07/1988
RPI 920
#9.1
02/09/1988
RPI 903
#6.1
08/04/1987
RPI 876
#7.1
11/04/1986
RPI 837
#4.1
01/28/1986
RPI 797
#3.1
10/25/1983
RPI 679
#2.1
02/22/1983
RPI 644
#21.1
Patente extinta em 30/12/97
07/01/2008
RPI 1956
From the same holder
Same category
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