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Official data from INPI

PROCESSO PARA MELHORAR A PERDA DE NÚCLEO DE MATERIAIS MAGNÉTICOS.

Em AnáliseInvention Patent

Application data

Number

PI8306095

Type

Invention Patent

Filing

11/07/1983

Publication

06/12/1984

Progress at the INPI

  1. Filing11/07/83
  2. Publication06/12/84
  3. Examination10/09/84
  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: 09/06/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Armco, Inc.

US

See this company's full portfolio

Inventors

S. W. (pessoa física)

Y. L. (pessoa física)

Technical data

IPC Classification

Priority claims

US

439.884 · 11/08/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

09/06/1988

RPI 933

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

03/19/1985

RPI 752

Solicitação de exame técnico

#4.1

10/09/1984

RPI 729

Publicação do pedido de patente

#3.1

06/12/1984

RPI 712

Pedido de patente depositado

#2.1

01/17/1984

RPI 691

Carta-patente expirada

#21.1

Patente extinta em 07/11/98

07/01/2008

RPI 1956

Pedido de licença compulsória

#20.1

11/17/1992

RPI 1146

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