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Official data from INPI

PROCESSO DE PREPARAÇÃO DE UM CATALISADOR E PROCESSO PARA POLIMERIZAÇÃO DE ALFA-OLEFINA

Em AnáliseInvention Patent

Application data

Number

PI8502131

Type

Invention Patent

Filing

04/30/1985

Publication

12/09/1986

Progress at the INPI

  1. Filing04/30/85
  2. Publication12/09/86
  3. Examination10/18/88
  4. Allowance03/12/91
  5. Grant05/26/92
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 10/18/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The Dow Chemical Company

US

See this company's full portfolio

Inventors

C. E. (pessoa física)

US

R. J. (pessoa física)

US

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/18/1988

RPI 939

Publicação do pedido de patente

#3.1

12/09/1986

RPI 842

Pedido de patente depositado

#2.1

07/09/1985

RPI 768

Carta-patente expirada

#21.1

Patente extinta em 30/04/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

05/26/1992

RPI 1121

15.5

12/03/1991

RPI 1096

Notificação para pagamento de retribuição

#13.1

06/25/1991

RPI 1073

Deferimento

#9.1

03/12/1991

RPI 1058

Exigência - art. 36 da LPI

#6.1

08/14/1990

RPI 1028

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