Carta-patente expirada
#21.1
Patente extinta em 27/09/2011
06/11/2013
RPI 2214
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Official data from INPI
PROCESSO PARA A PREPARAÇÃO DE HIDRÓXIDOS DE TÂNTALO E/OU NIÓBIO
Arquivada/ExtintaInvention Patent
Application data
Number
PI9104184Type
Invention Patent
Filing
09/27/1991
Publication
06/02/1992
Progress at the INPI
- Filing09/27/91
- Publication06/02/92
- Examination07/05/94
- Allowance11/03/98
- Grant06/01/99
- Expired06/11/13
The letters patent expired on 06/11/2013: 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: 06/11/2013. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
Hermann C. Starck Berlin GmbH & Co. KG
DE
Inventors
E. F. (pessoa física)
DE
H. Z. (pessoa física)
DE
W. B. (pessoa física)
DE
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Concessão da patente
#16.1
06/01/1999
RPI 1482
Deferimento
#9.1
11/03/1998
RPI 1452
Exigência - art. 36 da LPI
#6.1
03/10/1998
RPI 1420
Solicitação de exame técnico
#4.1
07/05/1994
RPI 1231
Publicação do pedido de patente
#3.1
06/02/1992
RPI 1122
Pedido de patente depositado
#2.1
11/05/1991
RPI 1092
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