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Official data from INPI

SEM TITULO

ConcedidaInvention Patent

Application data

Number

PI8301643

Type

Invention Patent

Filing

03/30/1983

Publication

11/06/1984

Progress at the INPI

  1. Filing03/30/83
  2. Publication11/06/84
  3. Examination11/25/86
  4. Allowance06/28/88
  5. Grant07/25/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Schlumberger Industrias Ltda

SP, BR

See this company's full portfolio

Inventors

R. I. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/25/1989

RPI 979

Notificação para pagamento de retribuição

#13.1

10/25/1988

RPI 940

Deferimento

#9.1

06/28/1988

RPI 923

Conhecimento de parecer técnico

#7.1

10/27/1987

RPI 888

Pedido de certificado de adição de invenção

#5.1

04/14/1987

RPI 860

Solicitação de exame técnico

#4.1

11/25/1986

RPI 840

Publicação do pedido de patente

#3.1

11/06/1984

RPI 733

Pedido de patente depositado

#2.1

05/17/1983

RPI 656

Carta-patente expirada

#21.1

Patente extinta em 30/03/98

07/01/2008

RPI 1956

20.4

10/09/1990

RPI 1036

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