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Official data from INPI

PROCESSO APERFEIÇOADO PARA A FABRICAÇÃO DE PLACAS CONTENDO METAL DURO REFRATÁRIO PARA CATODOS DE CÉLULAS DE ALUMÍNIO.

Em ExigênciaInvention Patent

Application data

Number

PI8407288

Type

Invention Patent

Filing

04/19/1984

Publication

02/18/1986

Progress at the INPI

  1. Filing04/19/84
  2. Publication02/18/86
  3. Examination11/24/87
  4. Allowance05/29/90
  5. Grant11/27/90
  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: 10/03/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

C. C. (pessoa física)

US

Inventors

W. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

576.836 · 02/03/1984

US

PCT/84/00602 · 04/19/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

10/03/1989

RPI 989

Solicitação de exame técnico

#4.1

11/24/1987

RPI 892

Notificação de entrada na fase nacional - PCT

#1.3

02/18/1986

RPI 800

Carta-patente expirada

#21.1

Patente extinta em 19/04/99

07/08/2008

RPI 1957

14.1

06/25/1991

RPI 1073

14.7

06/18/1991

RPI 1072

Concessão da patente

#16.1

11/27/1990

RPI 1043

Notificação para pagamento de retribuição

#13.1

09/04/1990

RPI 1031

Deferimento

#9.1

05/29/1990

RPI 1020

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