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Official data from INPI

APARELHO PARA EMPREGO EM COLUNA DE ENSAIO EM UM POÇO

ConcedidaInvention Patent

Application data

Number

PI8404747

Type

Invention Patent

Filing

09/21/1984

Publication

08/13/1985

Progress at the INPI

  1. Filing09/21/84
  2. Publication08/13/85
  3. Examination05/19/87
  4. Allowance01/24/89
  5. Grant09/26/89
  6. Terminated06/27/95

The patent was granted on 09/26/1989 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: 09/26/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Halliburton Company

US

See this company's full portfolio

Inventors

E. J. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

535,083 · 09/23/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/26/1989

RPI 988

Notificação para pagamento de retribuição

#13.1

05/30/1989

RPI 971

Deferimento

#9.1

01/24/1989

RPI 953

6.2

07/12/1988

RPI 925

Solicitação de exame técnico

#4.1

05/19/1987

RPI 865

Publicação do pedido de patente

#3.1

08/13/1985

RPI 773

Pedido de patente depositado

#2.1

12/04/1984

RPI 737

Anuidade - prazo legal encerrado

#18.2

06/27/1995

RPI 1282

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