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Official data from INPI

PROCESSO PARA A MISTURA DE ÓXIDO DE SILÍCIO A UMA PASTA DE CIMENTO HIDRÁULICO E PASTA DE CIMENTO HIDRÁULICO PARA CIMENTAÇÃO DE POÇOS DE PETRÓLEO

Arquivada/ExtintaInvention PatentPCT · NO1990000063

Application data

Number

PI9007277

Type

Invention Patent

Filing

04/09/1990

Publication

03/24/1992

PCT

NO1990000063

Progress at the INPI

  1. Filing04/09/90
  2. Publication03/24/92
  3. Examination09/29/92
  4. Allowance11/19/96
  5. Grant08/26/97
  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

D. A. (pessoa física)

NO

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Inventors

B. V. (pessoa física)

NO

Technical data

IPC Classification

Priority claims

NO

891463 · 04/10/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 09/04/2010

05/28/2013

RPI 2212

Concessão da patente

#16.1

08/26/1997

RPI 1395

Deferimento

#9.1

11/19/1996

RPI 1355

Exigência - art. 36 da LPI

#6.1

02/27/1996

RPI 1317

Solicitação de exame técnico

#4.1

09/29/1992

RPI 1139

Notificação de entrada na fase nacional - PCT

#1.3

03/24/1992

RPI 1112

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