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Official data from INPI

COROA CORTANTE ROTATIVA DE PERFURACAO DE ARRASTO, PROCESSO PARA PERFURACAO OU OBTENCAO DE TESTEMUNHOS GEOLOGICOS E ELEMENTO, DE CORTE ROTATIVO

ConcedidaInvention Patent

Application data

Number

PI8300813

Type

Invention Patent

Filing

02/20/1982

Publication

11/16/1983

Progress at the INPI

  1. Filing02/20/82
  2. Publication11/16/83
  3. Examination04/01/86
  4. Allowance06/28/88
  5. Grant07/25/89
  6. Terminated02/18/92

The patent was granted on 07/25/1989 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

UNICORN IND PLC [GB]

Inventors

G. J. (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

Exigência - art. 36 da LPI

#6.1

12/22/1987

RPI 896

Exigência - art. 36 da LPI

#6.1

04/14/1987

RPI 860

Solicitação de exame técnico

#4.1

04/01/1986

RPI 806

14.1

05/29/1984

RPI 710

Publicação do pedido de patente

#3.1

11/16/1983

RPI 682

Pedido de patente depositado

#2.1

04/05/1983

RPI 650

Anuidade - prazo legal encerrado

#18.2

02/18/1992

RPI 1107

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