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Official data from INPI

PROCESSO PARA PREPARAÇÃO DE UM POLIBUTENO DE BAIXO PESO MOLECULAR

Arquivada/ExtintaInvention Patent

Application data

Number

PI8905962

Type

Invention Patent

Filing

11/27/1989

Publication

06/19/1990

Progress at the INPI

  1. Filing11/27/89
  2. Publication06/19/90
  3. Examination06/23/92
  4. Allowance03/04/97
  5. Grant11/25/97
  6. Expired01/02/13

The letters patent expired on 01/02/2013: 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: 01/02/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Exxon Chemical Patents, Inc

US

See this company's full portfolio

Inventors

F. C. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

276,135 · 11/25/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 27/11/2009

01/02/2013

RPI 2191

Concessão da patente

#16.1

11/25/1997

RPI 1408

Notificação para pagamento de retribuição

#13.1

09/23/1997

RPI 1399

Deferimento

#9.1

03/04/1997

RPI 1370

Exigência - art. 36 da LPI

#6.1

01/16/1996

RPI 1311

Exigência - art. 36 da LPI

#6.1

07/18/1995

RPI 1285

Solicitação de exame técnico

#4.1

06/23/1992

RPI 1125

Publicação do pedido de patente

#3.1

06/19/1990

RPI 1023

Pedido de patente depositado

#2.1

03/27/1990

RPI 1011

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