Official data from INPI

PROCESSO PARA OBTENÇÃO DE PENTÓXIDO DE TÂNTALO DE ALTA PUREZA

Em AnáliseInvention Patent

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Application data

Number

PI8506340

Type

Invention Patent

Filing

12/17/1985

Publication

08/26/1986

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Progress at the INPI

Filing12/17/85
Publication08/26/86
Examination10/04/88
Allowance02/26/91
Grant09/24/91
Terminated08/15/95

The patent was granted on 09/24/1991 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 10/04/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Sumitomo Chemical Company, Limited

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Inventors

I. I. (pessoa física)

K. N. (pessoa física)

Technical data

IPC Classification

C01G 35/00

Priority claims

267029/84 · 12/18/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/04/1988

RPI 937

Publicação do pedido de patente

#3.1

08/26/1986

RPI 827

Pedido de patente depositado

#2.1

03/04/1986

RPI 802

Anuidade - prazo legal encerrado

#18.2

08/15/1995

RPI 1289

Concessão da patente

#16.1

09/24/1991

RPI 1086

Notificação para pagamento de retribuição

#13.1

06/11/1991

RPI 1071

Deferimento

#9.1

02/26/1991

RPI 1056

Exigência - art. 36 da LPI

#6.1

10/30/1990

RPI 1039

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