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Official data from INPI

COMPOSIÇÃO SELANTE

PublicadaInvention Patent

Application data

Number

PI8700910

Type

Invention Patent

Filing

02/26/1987

Publication

12/15/1987

Progress at the INPI

  1. Filing02/26/87
  2. Publication12/15/87
  3. Examination08/07/90
  4. Allowance07/07/92
  5. Grant03/30/93
  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: 12/15/1987. 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

D. C. (pessoa física)

R. G. (pessoa física)

US

S. C. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

835090 · 02/28/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

12/15/1987

RPI 895

Pedido de patente depositado

#2.1

06/23/1987

RPI 870

Carta-patente expirada

#21.1

Patente extinta em 26/02/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

03/30/1993

RPI 1165

Notificação para pagamento de retribuição

#13.1

11/24/1992

RPI 1147

Deferimento

#9.1

07/07/1992

RPI 1127

Exigência - art. 36 da LPI

#6.1

11/05/1991

RPI 1092

Solicitação de exame técnico

#4.1

08/07/1990

RPI 1027

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