Carta-patente expirada
#21.1
Patente extinta em 02/07/2011
06/04/2013
RPI 2213
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Official data from INPI
PROCESSO PARA A RECUPERAÇÃO E SEPARAÇÃO DE TÂNTALO E NIÓBIO.
Arquivada/ExtintaInvention Patent
Application data
Number
PI9102794Type
Invention Patent
Filing
07/02/1991
Publication
02/04/1992
Progress at the INPI
- Filing07/02/91
- Publication02/04/92
- Examination05/03/94
- Allowance08/25/98
- Grant02/23/99
- Expired06/04/13
The letters patent expired on 06/04/2013: 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: 06/04/2013. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
Hermann C. Starck Berlin GmbH & Co. KG
DE
Inventors
D. E. (pessoa física)
DE
D. B. (pessoa física)
DE
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Concessão da patente
#16.1
02/23/1999
RPI 1468
Deferimento
#9.1
08/25/1998
RPI 1444
Exigência - art. 36 da LPI
#6.1
03/10/1998
RPI 1420
Solicitação de exame técnico
#4.1
05/03/1994
RPI 1222
Publicação do pedido de patente
#3.1
02/04/1992
RPI 1105
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