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Official data from INPI

PROCESSO DE PRÉ-TRATAMENTO DE VINHOTO PELO USO DE ARGILAS MONTMORILONÍTICAS ATIVADAS POR VIA SÓDICA

Em AnáliseInvention Patent

Application data

Number

PI8405862

Type

Invention Patent

Filing

11/16/1984

Publication

06/17/1986

Progress at the INPI

  1. Filing11/16/84
  2. Publication06/17/86
  3. Examination04/26/88
  4. Allowance07/16/91
  5. Grant02/18/92
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 04/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

U. S. (pessoa física)

SE, BR

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Inventors

J. D. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

04/26/1988

RPI 914

Publicação do pedido de patente

#3.1

06/17/1986

RPI 817

Pedido de patente depositado

#2.1

12/24/1985

RPI 792

Carta-patente expirada

#21.1

Patente extinta em 16/11/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

02/18/1992

RPI 1107

Notificação para pagamento de retribuição

#13.1

11/12/1991

RPI 1093

Deferimento

#9.1

07/16/1991

RPI 1076

Exigência - art. 36 da LPI

#6.1

02/05/1991

RPI 1053

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