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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UM BISFENOL, E, PROCESSO PARA A PREPARAÇÃO DE UMA RESINA SULFONADA TROCADORA DE CÁTIONS APLICÁVEL COMO CATALISADOR

PublicadaInvention Patent

Application data

Number

PI8705736

Type

Invention Patent

Filing

10/28/1987

Publication

05/31/1988

Progress at the INPI

  1. Filing10/28/87
  2. Publication05/31/88
  3. Examination12/26/90
  4. Allowance06/27/95
  5. Grant01/30/96
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

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Inventors

S. L. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

925,779 · 10/30/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

05/31/1988

RPI 919

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Carta-patente expirada

#21.1

Patente extinta em 28/10/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

01/30/1996

RPI 1313

Notificação para pagamento de retribuição

#13.1

11/07/1995

RPI 1301

Deferimento

#9.1

06/27/1995

RPI 1282

Exigência - art. 36 da LPI

#6.1

02/08/1994

RPI 1210

Solicitação de exame técnico

#4.1

12/26/1990

RPI 1047

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