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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UM PÓ PRECURSOR DE VARISTOR DE ÓXIDO METÁLICO.

Arquivada/ExtintaInvention PatentPCT · US1987002695

Application data

Number

PI8707507

Type

Invention Patent

Filing

10/14/1987

Publication

02/21/1989

PCT

US1987002695

Progress at the INPI

  1. Filing10/14/87
  2. Publication02/21/89
  3. Examination03/06/90
  4. Allowance09/21/93
  5. Grant04/26/94
  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: 02/21/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

R. C. (pessoa física)

US

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Inventors

E. S. (pessoa física)

US

G. W. (pessoa física)

US

M. T. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

920.100 · 10/16/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação de entrada na fase nacional - PCT

#1.3

02/21/1989

RPI 957

Carta-patente expirada

#21.1

Patente extinta em 14/10/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/26/1994

RPI 1221

Deferimento

#9.1

09/21/1993

RPI 1190

Exigência - art. 36 da LPI

#6.1

04/27/1993

RPI 1169

Exigência - art. 36 da LPI

#6.1

10/27/1992

RPI 1143

Solicitação de exame técnico

#4.1

03/06/1990

RPI 1008

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