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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE UM ANIDRIDO SUCCÍNICO SUBSTITUÍDO

PublicadaInvention Patent

Application data

Number

PI8805888

Type

Invention Patent

Filing

11/10/1988

Publication

08/01/1989

Progress at the INPI

  1. Filing11/10/88
  2. Publication08/01/89
  3. Examination08/27/91
  4. Allowance03/19/96
  5. Grant12/31/96
  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: 08/01/1989. 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

H. F. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

120,257 · 11/13/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

08/01/1989

RPI 980

Pedido de patente depositado

#2.1

03/28/1989

RPI 962

Carta-patente expirada

#21.1

Patente extinta em 10/11/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

12/31/1996

RPI 1361

Deferimento

#9.1

03/19/1996

RPI 1320

Exigência - art. 36 da LPI

#6.1

08/02/1994

RPI 1235

Solicitação de exame técnico

#4.1

08/27/1991

RPI 1082

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