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Official data from INPI

SISTEMA DE LIGANTE, PRODUTO DE PAPEL CELULÓSICO E PROCESSO PARA PREPARAR UM CARBONATO DE CÁLCIO PRECIPITADO

Prazo de SigiloInvention Patent

Application data

Number

PI8902546

Type

Invention Patent

Filing

06/02/1989

Publication

03/20/1990

Progress at the INPI

  1. Filing06/02/89
  2. Publication03/20/90
  3. Examination09/11/90
  4. Allowance07/18/95
  5. Grant10/29/96
  6. Expired12/22/09

The letters patent expired on 12/22/2009: 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: 07/11/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minerals Technologies, Inc.

US

Pfizer, Inc.

US

See this company's full portfolio

Inventors

N. S. (pessoa física)

US

R. G. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

202.175 · 06/03/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

07/11/1989

RPI 977

Carta-patente expirada

#21.1

Patente extinta em 02/06/2004

12/22/2009

RPI 2033

Concessão da patente

#16.1

10/29/1996

RPI 1352

14.1

03/19/1996

RPI 1320

Notificação para pagamento de retribuição

#13.1

11/28/1995

RPI 1304

Deferimento

#9.1

07/18/1995

RPI 1285

Exigência - art. 36 da LPI

#6.1

08/02/1994

RPI 1235

Solicitação de exame técnico

#4.1

09/11/1990

RPI 1032

Publicação do pedido de patente

#3.1

03/20/1990

RPI 1010

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