Pedido de patente depositado
#2.1
07/04/1989
RPI 976
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Official data from INPI
PROCESSO PARA TRATAMENTO TÉRMICO DE CORPO DE AÇO RESISTENTE À CORROSÃO
Prazo de SigiloInvention Patent
Application data
Number
PI8902345Type
Invention Patent
Filing
05/19/1989
Publication
01/09/1990
Progress at the INPI
- Filing05/19/89
- Publication01/09/90
- Examination10/23/90
- Allowance07/30/96
- Grant09/30/97
- Expired05/21/13
The letters patent expired on 05/21/2013: 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: 07/04/1989. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
Middelburg Steel And Alloys (Proprietary) Limited
ZA
Inventors
J. H. (pessoa física)
ZA
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Carta-patente expirada
#21.1
Patente extinta em 19/05/2009
05/21/2013
RPI 2211
Concessão da patente
#16.1
09/30/1997
RPI 1400
Notificação para pagamento de retribuição
#13.1
03/25/1997
RPI 1373
Deferimento
#9.1
07/30/1996
RPI 1339
Solicitação de exame técnico
#4.1
10/23/1990
RPI 1038
Publicação do pedido de patente
#3.1
01/09/1990
RPI 1001
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