Carta-patente expirada
#21.1
Patente extinta em 09/04/2010
01/08/2013
RPI 2192
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Official data from INPI
PROCESSO PARA RECUPERAÇÃO DE RESÍDUOS DE UNIDADES DE DESIDROGENAÇÃO DE HIDROCARBONETOS AROMÁTICOS SUBSTITUÍDOS
Arquivada/ExtintaInvention Patent
Application data
Number
PI9001675Type
Invention Patent
Filing
04/09/1990
Publication
11/05/1991
Progress at the INPI
- Filing04/09/90
- Publication11/05/91
- Examination04/14/92
- Allowance08/26/97
- Grant08/25/98
- Expired01/08/13
The letters patent expired on 01/08/2013: 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: 01/08/2013. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
EDN - Estireno do Nordeste S/A
BA, BR
Inventors
S. M. (pessoa física)
BR
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Concessão da patente
#16.1
08/25/1998
RPI 1444
Deferimento
#9.1
08/26/1997
RPI 1395
Solicitação de exame técnico
#4.1
04/14/1992
RPI 1115
Publicação do pedido de patente
#3.1
11/05/1991
RPI 1092
Pedido de patente depositado
#2.1
08/14/1990
RPI 1028
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