Concessão da patente
#16.1
10/01/1985
RPI 780
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Official data from INPI
PROCESSO PARA RECUPERAR UM GAS CIRCULANTE SUPERFLUO E APARELHO PARA RECUPERAR O GAS SUPERFLUO NUMA INSTALACAO DE RESFRIAMENTO BRUSCO A SECO DE COQUE
ConcedidaInvention Patent
Progress at the INPI
- Filing12/27/78
- Publication
- Examination10/19/82
- Allowance11/13/84
- Grant10/01/85
- Expired06/21/94
The letters patent expired on 06/21/1994: 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: 10/01/1985. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
KAWATETSU CHEM IND CO LTD
Inventors
K. T. (pessoa física)
N. T. (pessoa física)
S. M. (pessoa física)
T. Y. (pessoa física)
Technical data
IPC Classification
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
14.7
05/14/1985
RPI 760
14.4
05/07/1985
RPI 759
Notificação para pagamento de retribuição
#13.1
03/26/1985
RPI 753
Deferimento
#9.1
11/13/1984
RPI 734
Exigência - art. 36 da LPI
#6.1
01/24/1984
RPI 692
Solicitação de exame técnico
#4.1
10/19/1982
RPI 626
Carta-patente expirada
#21.1
06/21/1994
RPI 1229
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