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Official data from INPI

APARELHO DE REGISTRO MAGNETICO DO TIPO DE EXPLORACAO HELICOIDAL

ConcedidaInvention Patent

Application data

Number

PI8207222

Type

Invention Patent

Filing

12/14/1981

Publication

10/18/1983

Progress at the INPI

  1. Filing12/14/81
  2. Publication10/18/83
  3. Examination01/14/86
  4. Allowance10/13/87
  5. Grant05/31/88
  6. Terminated10/23/90

The patent was granted on 05/31/1988 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SONY CORP [JP]

See this company's full portfolio

Inventors

S. S. (pessoa física)

T. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1988

RPI 919

Notificação para pagamento de retribuição

#13.1

02/09/1988

RPI 903

Deferimento

#9.1

10/13/1987

RPI 886

Exigência - art. 36 da LPI

#6.1

12/16/1986

RPI 843

Solicitação de exame técnico

#4.1

01/14/1986

RPI 795

8.1

10/22/1985

RPI 783

Publicação do pedido de patente

#3.1

10/18/1983

RPI 678

Pedido de patente depositado

#2.1

02/01/1983

RPI 641

Anuidade - prazo legal encerrado

#18.2

10/23/1990

RPI 1038

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