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Official data from INPI

ESTRUTURA MARÍTIMA DE PERFURAÇÃO E PRODUÇÃO

ConcedidaInvention Patent

Application data

Number

PI8200809

Type

Invention Patent

Filing

02/15/1982

Publication

12/21/1982

Progress at the INPI

  1. Filing02/15/82
  2. Publication12/21/82
  3. Examination02/26/85
  4. Allowance07/28/87
  5. Grant12/29/87
  6. Terminated07/18/95

The patent was granted on 12/29/1987 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 12/29/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Chevron Research company

US

See this company's full portfolio

Inventors

B. A. (pessoa física)

US

W. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

235,274 · 02/17/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/29/1987

RPI 897

Notificação para pagamento de retribuição

#13.1

11/24/1987

RPI 892

Deferimento

#9.1

07/28/1987

RPI 875

Exigência - art. 36 da LPI

#6.1

10/21/1986

RPI 835

Conhecimento de parecer técnico

#7.1

02/12/1986

RPI 799

Conhecimento de parecer técnico

#7.1

10/22/1985

RPI 783

Pedido de certificado de adição de invenção

#5.1

07/16/1985

RPI 769

Solicitação de exame técnico

#4.1

02/26/1985

RPI 749

Publicação do pedido de patente

#3.1

12/21/1982

RPI 635

Pedido de patente depositado

#2.1

04/06/1982

RPI 598

Anuidade - prazo legal encerrado

#18.2

07/18/1995

RPI 1285

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