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Official data from INPI

PROCESSO PARA CONTROLAR UMA COLUNA DE DESTILAÇÃO

Em ExigênciaInvention Patent

Application data

Number

PI8403978

Type

Invention Patent

Filing

08/09/1984

Publication

07/09/1985

Progress at the INPI

  1. Filing08/09/84
  2. Publication07/09/85
  3. Examination09/30/86
  4. Allowance03/26/91
  5. Grant10/29/91
  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: 07/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Nippon Zeon Co. Ltd.

JP

See this company's full portfolio

Inventors

T. H. (pessoa física)

JP

Technical data

IPC Classification

Priority claims

JP

58-144.483 · 08/09/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

07/26/1988

RPI 927

Solicitação de exame técnico

#4.1

09/30/1986

RPI 832

Publicação do pedido de patente

#3.1

07/09/1985

RPI 768

Pedido de patente depositado

#2.1

10/16/1984

RPI 730

Carta-patente expirada

#21.1

Patente extinta em 09/08/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

10/29/1991

RPI 1091

Notificação para pagamento de retribuição

#13.1

07/09/1991

RPI 1075

Deferimento

#9.1

03/26/1991

RPI 1060

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