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Official data from INPI

CARBONATO DE CÁLCIO ESTABILIZADO A ÁCIDO, PROCESSO PARA A SUA PRODUÇÃO E MÉTODO PARA INCREMENTAR AS PROPRIEDADES ÓPTICAS DE PAPEL

Arquivada/ExtintaInvention Patent

Application data

Number

PI9100922

Type

Invention Patent

Filing

03/07/1991

Publication

11/05/1991

Progress at the INPI

  1. Filing03/07/91
  2. Publication11/05/91
  3. Examination03/29/94
  4. Allowance05/25/99
  5. Grant12/28/99
  6. Expired05/28/13

The letters patent expired on 05/28/2013: 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: 05/28/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minerals Technologies, Inc.

US

Pfizer, Inc.

US

Specialty Minerals (Michigan) Inc.

US

See this company's full portfolio

Inventors

J. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

491.366 · 03/09/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 07/03/2011

05/28/2013

RPI 2212

Transferência deferida

#25.1

Transferido de: Minerals Technologies Inc.

09/26/2006

RPI 1864

Alteração de sede deferida

#25.7

Sede alterada conforme solicitado na Petição nº 020050039896/RJ de 23/05/2005.

09/12/2006

RPI 1862

Concessão da patente

#16.1

12/28/1999

RPI 1512

Deferimento

#9.1

05/25/1999

RPI 1481

Exigência - art. 36 da LPI

#6.1

01/13/1998

RPI 1412

14.1

12/05/1995

RPI 1305

Solicitação de exame técnico

#4.1

03/29/1994

RPI 1217

Publicação do pedido de patente

#3.1

11/05/1991

RPI 1092

Pedido de patente depositado

#2.1

09/03/1991

RPI 1083

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