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Official data from INPI

PROCESSO PARA FABRICAR UM MEIO DE GRACAO MAGNETICA E MEIO DE GRAVACAO MAGNETICA

ConcedidaInvention Patent
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Application data

Number

PI8102331

Type

Invention Patent

Filing

04/17/1980

Publication

12/15/1981
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Progress at the INPI

  1. Filing04/17/80
  2. Publication12/15/81
  3. Examination02/14/84
  4. Allowance11/03/87
  5. Grant05/31/88
  6. Terminated08/30/94

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

MINNESOTA MINING & MFG

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Inventors

P. J. (pessoa física)

Technical data

IPC Classification

C08J 7/04C08K 5/34C08L 101/00C08L 33/00C08L 33/02C08L 67/00C09D 5/23G11B 5/702

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

03/01/1988

RPI 906

Deferimento

#9.1

11/03/1987

RPI 889

Exigência - art. 36 da LPI

#6.1

06/03/1986

RPI 815

Exigência - art. 36 da LPI

#6.1

07/02/1985

RPI 767

Exigência - art. 36 da LPI

#6.1

12/11/1984

RPI 738

Solicitação de exame técnico

#4.1

02/14/1984

RPI 695

Publicação do pedido de patente

#3.1

12/15/1981

RPI 582

Anuidade - prazo legal encerrado

#18.2

08/30/1994

RPI 1239

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