Concessão da patente
#16.1
01/10/1989
RPI 951
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Official data from INPI
PROCESSO PARA A SEPARAÇÃO DE 2,4-DIISOCIANOTOTOLUENO PURO OU DE MISTURAS DE ISÔMEROS APRESENTANDOUM TEOR AUMENTADO EM 2,4-DIISOCIANATOTOLUENO DE MISTURAS DE ISÔMEROS CONSTITUINDO SUBSTANCIALMENTE DE 2,4- E 2,6-DIISOCIANATOTOLUENO.
ConcedidaInvention Patent
Application data
Number
PI8302789Type
Invention Patent
Filing
05/27/1983
Publication
01/24/1984
Progress at the INPI
- Filing05/27/83
- Publication01/24/84
- Examination05/06/86
- Allowance06/21/88
- Grant01/10/89
- Terminated04/25/95
The patent was granted on 01/10/1989 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.
Talk to a specialistLatest action published by the INPI: 01/10/1989. We update with every new RPI gazette, published weekly.
Applicants and inventors
Applicants
B. A. (pessoa física)
DE
Inventors
E. B. (pessoa física)
Technical data
IPC Classification
No IPC classification.
Priority claims
DE
P 32 20 439.6 · 05/29/1982
Prosecution history
Publications in the Brazilian Industrial Property Gazette (RPI).
Notificação para pagamento de retribuição
#13.1
10/25/1988
RPI 940
Deferimento
#9.1
06/21/1988
RPI 922
Solicitação de exame técnico
#4.1
05/06/1986
RPI 811
Publicação do pedido de patente
#3.1
01/24/1984
RPI 692
Pedido de patente depositado
#2.1
07/12/1983
RPI 664
Anuidade - prazo legal encerrado
#18.2
04/25/1995
RPI 1273
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