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Official data from INPI

PROCESSO ELETROQUÍMICO PARA PRODUÇÃO DE DÍOXIDO DE CLORO

Em AnáliseInvention Patent

Application data

Number

PI8802568

Type

Invention Patent

Filing

05/26/1988

Publication

12/20/1988

Progress at the INPI

  1. Filing05/26/88
  2. Publication12/20/88
  3. Examination07/04/89
  4. Allowance06/20/95
  5. Grant03/26/96
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 07/04/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Sterling Canada, Inc

US

Tenneco Canada Inc

CA

See this company's full portfolio

Inventors

M. L. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

CA

538.404 · 05/29/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

07/04/1989

RPI 976

Publicação do pedido de patente

#3.1

12/20/1988

RPI 948

Pedido de patente depositado

#2.1

10/18/1988

RPI 939

Carta-patente expirada

#21.1

Patente extinta em 26/05/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

03/26/1996

RPI 1321

Notificação para pagamento de retribuição

#13.1

10/31/1995

RPI 1300

Deferimento

#9.1

06/20/1995

RPI 1281

Exigência - art. 36 da LPI

#6.1

11/29/1994

RPI 1252

14.1

04/27/1993

RPI 1169

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