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Official data from INPI

CONJUNTO E PROCESSO DE COMPLETAMENTO DE POÇO DE INJEÇÃO.

ConcedidaInvention Patent

Application data

Number

PI8204396

Type

Invention Patent

Filing

07/28/1982

Publication

07/19/1983

Progress at the INPI

  1. Filing07/28/82
  2. Publication07/19/83
  3. Examination08/27/85
  4. Allowance07/14/87
  5. Grant12/29/87
  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: 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

A. O. (pessoa física)

US

J. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

288.258 · 07/29/1981

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

11/10/1987

RPI 890

Deferimento

#9.1

07/14/1987

RPI 873

Exigência - art. 36 da LPI

#6.1

10/21/1986

RPI 835

Solicitação de exame técnico

#4.1

08/27/1985

RPI 775

Publicação do pedido de patente

#3.1

07/19/1983

RPI 665

Pedido de patente depositado

#2.1

09/08/1982

RPI 620

Carta-patente expirada

#21.1

Patente extinta em 28/07/97

07/01/2008

RPI 1956

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