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Official data from INPI

PLATAFORMA AUTO-ELEVATORIA DE PERFURACAO MARITIMA

ConcedidaInvention Patent
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Application data

Number

PI7804645

Type

Invention Patent

Filing

07/19/1978

Publication

-
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Progress at the INPI

  1. Filing07/19/78
  2. Publication
  3. Examination02/24/82
  4. Allowance06/14/83
  5. Grant12/27/83
  6. Expired11/30/93

The letters patent expired on 11/30/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 12/27/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PETROLEO BRASILEIRO SA

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Inventors

M. S. (pessoa física)

Technical data

IPC Classification

B63B 35/44

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/27/1983

RPI 688

Notificação para pagamento de retribuição

#13.1

10/04/1983

RPI 676

Deferimento

#9.1

06/14/1983

RPI 660

8.1

02/16/1983

RPI 643

Solicitação de exame técnico

#4.1

02/24/1982

RPI 592

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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