Carta-patente expirada
#21.1
Patente extinta em 16/10/2009
12/26/2012
RPI 2190
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Official data from INPI
Processo para a produção de aço a partir de minério fino
Arquivada/ExtintaInvention Patent
Application data
Number
PI8905241Type
Invention Patent
Filing
10/16/1989
Publication
05/15/1990
Progress at the INPI
- Filing10/16/89
- Publication05/15/90
- Examination10/16/90
- Allowance09/23/97
- Grant07/28/98
- Expired12/26/12
The letters patent expired on 12/26/2012: 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: 12/26/2012. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
R. W. (pessoa física)
DE
Inventors
R. W. (pessoa física)
DE
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Concessão da patente
#16.1
07/28/1998
RPI 1440
Deferimento
#9.1
09/23/1997
RPI 1399
Solicitação de exame técnico
#4.1
10/16/1990
RPI 1037
Publicação do pedido de patente
#3.1
05/15/1990
RPI 1018
Pedido de patente depositado
#2.1
03/01/1990
RPI 1007
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