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Official data from INPI

MEIO MAGNÉTICO DE GRAVAÇÃO APERFEIÇOADO COM CAMADA SUBJACENTE DE LIGA DE CROMO E CAMADA MAGNÉTICA À BASE DE COBALTO

PublicadaInvention Patent

Application data

Number

PI8701656

Type

Invention Patent

Filing

04/08/1987

Publication

01/12/1988

Progress at the INPI

  1. Filing04/08/87
  2. Publication01/12/88
  3. Examination06/19/90
  4. Allowance01/18/94
  5. Grant06/28/94
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 01/12/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

I. C. (pessoa física)

US

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Inventors

J. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

857,020 · 04/29/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

01/12/1988

RPI 899

Pedido de patente depositado

#2.1

07/14/1987

RPI 873

Carta-patente expirada

#21.1

Patente extinta em 08/04/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

06/28/1994

RPI 1230

Notificação para pagamento de retribuição

#13.1

05/10/1994

RPI 1223

Deferimento

#9.1

01/18/1994

RPI 1207

Exigência - art. 36 da LPI

#6.1

10/15/1991

RPI 1089

Solicitação de exame técnico

#4.1

06/19/1990

RPI 1023

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