20.4
12/16/1986
RPI 843
The letters patent expired on 07/26/1994: 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: 12/16/1986. We update with every new RPI gazette, published weekly.
Applicants
U. C. (pessoa física)
US
Inventors
No inventors listed.
Publications in the Brazilian Industrial Property Gazette (RPI).
12/16/1986
RPI 843
#20.1
12/09/1986
RPI 842
#13.1
09/21/1982
RPI 622
#9.1
06/01/1982
RPI 606
#15.11
Procedimento automático de reclassificação. A classificação IPC anterior era F27D 23/02.
03/27/2018
RPI 2464
#21.1
07/26/1994
RPI 1234
#20.1
01/16/1990
RPI 1002
01/09/1990
RPI 1001
From the same holder
Same category
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