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Official data from INPI

MÉTODO E APARELHO PARA A SÍNTESE CONTÍNUA DE UMA SOLUÇÃO AQUOSA DE SULFATO DE ALUMÍNIO DERIVADA DE SEDIMENTO DE HIDRÓXIDO DE ALUMÍNIO

Em AnáliseInvention Patent

Application data

Number

PI8706255

Type

Invention Patent

Filing

11/16/1987

Publication

06/13/1989

Progress at the INPI

  1. Filing11/16/87
  2. Publication06/13/89
  3. Examination11/21/89
  4. Allowance03/01/94
  5. Grant07/26/94
  6. Expired07/29/08

The letters patent expired on 07/29/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 11/21/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Y. C. (pessoa física)

JP

Y. K. (pessoa física)

JP

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Inventors

H. Y. (pessoa física)

JP

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/21/1989

RPI 996

Publicação do pedido de patente

#3.1

06/13/1989

RPI 973

Pedido de patente depositado

#2.1

03/01/1988

RPI 906

Carta-patente expirada

#21.1

Patente extinta em 16/11/2002

07/29/2008

RPI 1960

20.4

04/09/1996

RPI 1323

Concessão da patente

#16.1

07/26/1994

RPI 1234

Deferimento

#9.1

03/01/1994

RPI 1213

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